A Comprehensive Network Diagnostics & Utility Toolkit for Android
Copyright © 2024-2026 Khoo Lay Yang - All Rights Reserved
- About
- Feature Highlights
- Key Features
- Technical Stack
- Design System
- UI/UX Features
- Multi-language Support
- What's New
- Getting Started
- Features Breakdown
- Use Cases
- Privacy & Security
- Responsible Use
- Contributing
- License & Attribution
- Author
- Support
- Acknowledgments
- Statistics
CV Toolkit is a professional-grade, all-in-one Android application designed for network diagnostics, cloud infrastructure monitoring, system information, and a comprehensive suite of developer utilities. Built with modern Android technologies (Kotlin 2.3.20 + Jetpack Compose), it delivers 133 powerful tools across 139 screens in one beautifully designed app.
Perfect for:
- 👨💻 Network Administrators - Comprehensive network diagnostics and monitoring
- 🌐 Cloud Engineers - Test connectivity to 311+ regions across 14 cloud providers with real-time graphs
- 🔐 Security Professionals - Port scanning, SSL checking, and security analysis tools
- 💻 Software Developers - Encoding, hashing, JWT decoding, and development utilities
- 🎓 Students & Educators - Learn networking concepts with hands-on tools
- 🏠 Home Users - Troubleshoot network issues and monitor your connection
Why CV Toolkit?
- ✅ All processing is done 100% locally on your device
- ✅ Your data never leaves your phone - complete privacy guaranteed
- ✅ No registration or account required
- ✅ Works offline for most tools (network tools require connectivity)
- ✅ Professional-grade accuracy and performance
- ✅ Beautiful, modern Material Design 3 interface
- ✅ Regular updates with new features and improvements
The crown jewel of CV Toolkit - a professional-grade network monitoring tool featuring:
- Real-time line graphs with multi-region visualization
- Continuous monitoring with configurable intervals (1s/2s/5s)
- Comprehensive statistics: Min, Max, Avg, Jitter, and Packet Loss tracking
- 311+ test regions across 14 global cloud providers
- Monitor 35+ regions simultaneously with color-coded tracking
- Edge location detection for Cloudflare, CloudFront, and Alibaba Cloud
- Background service support for uninterrupted monitoring
Everything you need for network diagnostics, development, PDF management, image processing, code editing, Malaysia & Singapore open data, and system analysis in one app.
- Zero data collection
- No server uploads
- 100% local processing
- Transparent and well-documented
- Speed Test - Comprehensive internet speed testing with download/upload speeds, ping latency, jitter measurement, and historical tracking. Foreground service support for uninterrupted testing. Custom targets are now persisted across sessions — add your own with the + button and delete them anytime from the dropdown
- Ping Test - ICMP ping testing with packet count configuration, timeout settings, and detailed statistics (min/max/avg/packet loss)
- Continuous Ping - Multi-host real-time ping monitoring with live line graphs, color-coded per host, for ongoing connectivity analysis
- Traceroute - Visual network path tracing showing all hops with latency measurements and geographic information
- Port Scanner - Scan for open ports on any host with service detection and parallel scanning
- Network Scanner (Device Discovery) - Discover all devices connected to your network with MAC address lookup and manufacturer identification
- IP Lookup - Get detailed geolocation, ISP, security flags (VPN/proxy/TOR detection), and carrier information for any IP address with local history
- DNS Lookup - Comprehensive DNS record querying (A, AAAA, CNAME, MX, TXT, NS, SOA, PTR) with custom DNS server support and response time tracking
- Subnet Calculator - Advanced IPv4/IPv6 subnet calculations with CIDR notation, network/broadcast addresses, usable host range, and subnet mask conversion
- SSL/TLS Checker - Detailed SSL certificate inspection including validity period, issuer information, subject details, certificate chain, encryption algorithms, and expiration warnings
- Whois Lookup - Get domain registration information
- HTTP Headers Viewer - Inspect HTTP response headers
- Custom Request Builder - Build and send custom HTTP/CURL requests with headers and body
- WiFi Analyzer - Analyze WiFi signal strength, channels, and network details
- DNS Benchmark - Compare response times across 10 popular DNS providers (Google, Cloudflare, Quad9, OpenDNS, AdGuard, etc.) with bar chart visualization, sorting by speed/name/reliability, configurable query count, and detailed min/max/avg statistics
- CDN & Cloud Latency Test - Real-time monitoring with live graphs - Test latency to 311+ regions across 14 major providers with continuous ping, multi-region tracking, detailed statistics (min/max/avg/jitter/packet loss), automatic edge detection, and color-coded line charts:
- AWS (Amazon Web Services)
- GCP (Google Cloud Platform)
- Azure (Microsoft Azure)
- Oracle Cloud
- Alibaba Cloud
- DigitalOcean
- Linode (Akamai)
- Vultr
- Hetzner
- OVH
- Tencent Cloud
- Huawei Cloud
- Lightsail
- Fastly
- Network Stress Test - Quick-access hub for network performance diagnostics including speed tests, DNS lookups, and port scanning
🔄 Encoders & Decoders (8 tools):
- JSON Formatter/Validator - Format, minify, and validate JSON with syntax highlighting, statistics (key/value counts, depth, types), configurable indentation, and one-tap copy
- Base64 Encoder/Decoder - Encode and decode Base64 strings
- URL Encoder/Decoder - Encode and decode URL strings
- Binary Converter - Convert text to/from Binary, Hex, and Octal
- Hex Encoder/Decoder - Convert text to/from hexadecimal
- ASCII Converter - Convert text to ASCII values and vice versa
- JWT Decoder - Decode and inspect JWT tokens
- Image Base64 - Convert images to/from Base64 encoding
🔐 Security & Crypto (6 tools):
- Hash Generator - Generate MD5, SHA-1, SHA-256, SHA-384, SHA-512 hashes
- Caesar Cipher - Encrypt/decrypt with Caesar cipher, ROT13, ROT47
- Morse Code Converter - Convert text to Morse code and back
- Password Generator - Generate strong, secure passwords with customizable options
- Password Strength Checker - Analyze password entropy, character composition, crack time estimation, detect common patterns/sequences, and provide detailed security checks with visual strength meter
- File Hash Calculator - Calculate MD5, SHA, CRC32 hashes for files with metadata
📱 QR & Barcode (3 tools):
- QR Code Generator - Generate QR codes from text, URLs, contacts, etc.
- Barcode Generator - Generate various barcode formats (EAN, UPC, Code 128, etc.)
- QR/Barcode Scanner - Scan and decode QR codes and barcodes with camera
🌐 Web & API (4 tools):
- API Tester - Save, organize, and execute API requests with custom headers and body
- User Agent Parser - Parse and analyze browser User-Agent strings
- Robots.txt Analyzer - Fetch and parse robots.txt files from any domain
- Sitemap Viewer - Parse and browse XML sitemaps
📄 PDF & Documents (8 tools):
- PDF Viewer - View and navigate PDF documents
- PDF Merge - Combine multiple PDF files into one with multi-select import, drag-to-reorder, and full page preview before saving
- PDF Split - Split PDF into individual pages or custom page ranges with visual page thumbnails, three split modes (Each Page, Page Range, Select Pages), and page selection/deselection
- PDF to Image - Extract PDF pages as high-quality PNG or JPEG images with configurable DPI (72/150/200/300), JPEG quality slider, per-page preview with dimensions and file size, and individual page saving
- Image to PDF - Convert images to PDF with multi-select import, drag-to-reorder, per-image rotation (90°/180°/270°), visual crop editor with draggable handles, page size/orientation/margin/fit settings, and full page preview before export
- Compress PDF - Reduce PDF file size
- PDF Password - Add or remove password protection from PDFs with 128-bit encryption, configurable permissions (printing, copying, modifying), auto-detection of encrypted files, and password verification
- Slides to PDF - Convert presentation slides (PPT) to PDF
✏️ Editors (4 tools):
- Text Editor - Create and edit text files on device
- Markdown Editor - Write markdown with live preview
- Markdown Preview - Render and preview markdown content
- SVG Viewer & Editor - View and edit SVG vector graphics
🎨 Media & Colors (18 tools):
- Compress Image - Reduce image file size while maintaining quality
- Image Resizer - Resize images to exact dimensions with social media presets (Instagram, Facebook, Twitter/X, YouTube, LinkedIn, TikTok, Pinterest, WhatsApp) and common sizes (HD, Full HD, 2K, 4K, A4), with aspect ratio locking
- Image Cropper - Crop images with 10 aspect ratio presets (Free, 1:1, 4:3, 3:4, 16:9, 9:16, 3:2, 2:3, 5:4, 4:5), visual crop overlay with rule-of-thirds grid, draggable crop area, and corner handles
- Image Format Converter - Convert between JPEG, PNG, WebP (Lossy/Lossless), and BMP with quality control for lossy formats and before/after size comparison
- EXIF Viewer - View detailed image EXIF metadata organized by category: Camera (make, model, lens), Image Details (dimensions, resolution, color space, orientation), Shooting Settings (exposure, aperture, ISO, focal length, flash, metering), Date & Time, GPS Location (lat/long, altitude), and Copyright info. Copy all data to clipboard
- EXIF Remover - Strip EXIF metadata from images for privacy with batch processing support, EXIF tag count display, and clean JPEG output at 95% quality
- Color Picker - Pick colors from any image by tapping, with HEX, RGB, RGBA, and HSL values, per-value copy buttons, color history palette, and copy-all functionality
- Color Converter - Convert between HEX, RGB, HSL, and CMYK color formats
- Color Palette Generator - Generate and explore color palettes
- Favicon Generator - Generate favicons from images in 15 standard sizes (16x16 to 512x512) for browser tabs, Apple Touch Icons, Android Chrome, PWA, Windows tiles, and more, with select all/none, individual previews, and per-size saving
- GIF Maker - Create animated GIFs from multiple images or convert video to GIF with configurable frame delay (FPS), output width, and frame preview
- Photo Collage - Arrange multiple photos (2-6) into 7 layout templates (side-by-side, stacked, grid, L-shaped) with adjustable padding, background color, and output size
- Image Watermark - Add text or image watermarks with customizable opacity, position (9-point grid), rotation, color, size, and tiled pattern mode
- Image Background Remover - Remove image backgrounds by color selection with adjustable threshold and edge sensitivity, side-by-side before/after preview
- Image Filters - Apply visual filters and effects to images
- Image Rotate/Flip - Rotate and flip images with quick 90°/180°/270° rotation and horizontal/vertical flip options
- Meme Generator - Create memes by adding customizable text overlays to images
- Screenshot Stitcher - Combine multiple screenshots into a single long vertical image for sharing
🔢 Converters & Calculators (10 tools):
- IP Calculator - Convert between different IP formats
- Unit Converter - Convert length, weight, temperature, and data sizes
- World Time - View current time across global time zones
- Unix Timestamp Converter - Convert between Unix timestamps and readable dates
- UUID Generator - Generate UUID v1, v4, and v5
- Number Base Converter - Convert numbers between decimal, binary, hexadecimal, octal, and custom bases with real-time conversion
- Currency Converter - Live currency exchange rates for 30+ currencies with conversion calculations and caching
- Aspect Ratio Calculator - Calculate aspect ratios, scale dimensions while maintaining ratios, and preview common presets (16:9, 4:3, etc.)
- Date Calculator - Calculate days between dates, add/subtract time periods, and determine age with detailed year/month/day breakdowns
- Scientific Calculator - Full-featured calculator with trigonometric, logarithmic, and advanced math functions, history tracking, and angle mode selection
📝 Text & Misc (9 tools):
- Text Counter - Count words, characters, lines, and paragraphs
- Text Diff - Compare two texts and highlight differences
- Lorem Ipsum Generator - Generate placeholder text for design and development
- Typing Test - Practice and measure typing speed (WPM) and accuracy with 2,300+ unique content pieces across 25+ topics. Features 3 modes (Words/Sentences/Paragraphs), 3 difficulty levels, configurable duration (30s/60s/120s/Full Text), real-time stats, and repeat/new test options. Every session generates a unique random combination
- Stopwatch - Timer with lap functionality
- Text Case Converter - Convert text between uppercase, lowercase, title case, sentence case, and other formats
- Pomodoro Timer - Time-boxed productivity timer with work/break intervals for focused sessions
- Note Pad - Simple and quick note-taking utility
- Random Generator - Multi-tab random generator for numbers, strings, colors, UUIDs, and dice rolls with customizable parameters
- Device Information - Complete system information (CPU, RAM, storage, OS, etc.)
- DRM & Codec Info - View DRM systems, video/audio codecs, and supported formats
- Camera Information - Detailed camera specifications and capabilities
- Security Audit - Comprehensive device security check and vulnerability assessment
- Sensor Dashboard - Real-time readings from all device sensors (accelerometer, gyroscope, proximity, etc.)
- NFC Reader - Read and display NFC tag contents including tag type (MIFARE, ISO 14443, FeliCa, etc.), tag ID, NDEF records with parsed URI/text/MIME payloads, supported technologies, writable status, and max size. Copy all data to clipboard
- Battery Info - Real-time battery status including level, health, temperature, voltage, and charging information with auto-refresh
- Display Info - Detailed display specifications including resolution, density, refresh rate, supported refresh rates, and HDR capabilities
- Storage Analyzer - Visual breakdown of internal storage usage by category (apps, media, cache, etc.) with ring charts and RAM analysis
- Bluetooth Scanner - Discover and list nearby Bluetooth devices with signal strength (RSSI), device type, bond status, and BLE/Classic support
- GPS Location - Track current GPS location with coordinates, address, altitude, speed, and connected satellite constellation information
Real-time government statistics and data from Malaysia's official open data portal (DOSM & data.gov.my):
- Weather - Weather forecasts, severe weather warnings, and earthquake information for Malaysia using official government API
- Birthday Explorer - Explore the number of births on any selected date in Malaysia with historical data spanning 1920–2022
- Data Catalogue - Browse Malaysia's comprehensive open data catalogue organized by categories (demography, households, economy, etc.)
- Immigration - Track international arrivals to Malaysia by country with monthly trends and demographic breakdowns
- Fuel Price - Historical fuel prices (RON95, RON97, diesel) in Malaysia with weekly change data and price trend charts
- Population - Population statistics by Malaysian states with bar charts, sorting by name or population, and year selection
- Exchange Rate - BNM historical exchange rates for MYR against 15+ currencies with trend visualization
- CPI & Inflation - Consumer Price Index trends and year-over-year inflation rates for Malaysia
- COVID-19 - COVID-19 case statistics by Malaysian state with new cases, active cases, recoveries, and imported case tracking
- Crime Statistics - Crime data by category (assault, robbery, theft, etc.) with yearly trends and summary statistics
- Transport Ridership - Public transportation ridership data for KL/Selangor including LRT, MRT, Monorail, KTM, and ETS services
- Births & Deaths - Annual births vs deaths demographic trends with line charts and natural growth statistics
- Marriage Statistics - Annual marriage trends with counts, rates per 1,000, peak year analysis, and trend visualization
- Household Income - Household income comparison by state with mean/median income, expenditure, bar charts, and year selector
- GDP & GNI - Real GDP and GNI growth trends with per-capita analysis, year-over-year growth percentages, and multi-line charts
- Labour Market - Monthly employment and unemployment statistics with color-coded unemployment rate trends and labour force breakdown
- Blood Donations - Daily blood donation tracking with 7-day/30-day averages, monthly aggregation bar charts, and color-coded donation levels
- Interest Rates - BNM interest rate trends including OPR, base rate, fixed deposit, and savings rates with multi-line comparison charts
- Electricity Consumption - Monthly electricity consumption by sector (residential, commercial, industrial) with trend charts and sector breakdown
- EPF Dividend - Historical EPF dividend rates for conventional and shariah accounts with trend visualization and rate comparison
- Vehicle Registrations - Monthly car registration trends with 12-month averages, peak month analysis, and bar charts
- Transit Tracker - Real-time public transport vehicle tracking on an interactive OpenStreetMap with GTFS Realtime data from 15 Malaysian transit agencies (KTMB, Prasarana, myBAS), live vehicle positions with route/speed/bearing, user geolocation with nearest-first sorting, vehicle route tracing with polyline trails, and auto-refresh every 30 seconds
- Sarawak Data - Browse and search 200+ Sarawak state government datasets with dedicated viewer pages featuring auto-charts, stats, search, filter, and multi-format parsing (XLSX, CSV, HTML, JSON)
Real-time government data and 5,000+ datasets from Singapore's data.gov.sg:
Real-time Weather & Environment:
- SG Weather - 24-hour forecast, 2-hour area forecast, and 4-day outlook with regional breakdowns by area (North/South/East/West/Central)
- SG Air Quality - PSI, PM2.5, and UV Index readings by region with color-coded health indicators and hourly bar charts
- SG Environment - Real-time air temperature, rainfall, humidity, wind speed, and wind direction readings from 50+ weather stations with bar charts
- SG Heat Stress (WBGT) - Wet Bulb Globe Temperature readings from 15 monitoring stations with heat stress level indicators (Low/Moderate/High/Extreme)
- SG Lightning - Real-time lightning strike observations on an interactive OpenStreetMap with Cloud-to-Cloud and Cloud-to-Ground classification
- SG Flood Alerts - Active flood warnings with severity levels, affected areas, and recommended actions from PUB
Transport:
- SG Taxi Availability - Real-time map of 3,000+ available taxis across Singapore on OpenStreetMap with regional distribution summary
- SG Carpark - Real-time HDB carpark lot availability with search, sort by availability/occupancy, and color-coded occupancy bars
- SG Traffic Cameras - Live traffic camera images in a 2-column grid with tap-to-expand full-screen view from 80+ cameras
Intellectual Property:
- SG IP Applications - Design and patent application lookup by lodgement date with status tracking and detailed application info
Reference:
- SG Data Catalogue - Browse and search 5,000+ government datasets, each opening as its own dedicated page with auto-generated charts, summary statistics, search, filter dropdowns, column sorting, and multi-format parsing (XLSX, CSV, HTML, JSON)
Ireland's open data portal with 21,900+ government datasets:
- IE Data Catalogue - Browse and search 21,900+ Irish government datasets from data.gov.ie with theme filters (Government, Environment, Health, Society, Transport), each opening as a dedicated page with auto-generated charts, summary statistics, search, filter, sort, and multi-format parsing (XLSX, CSV, HTML tables, JSON) with WebView fallback for web-based datasets
- Language: Kotlin 2.3.20 (100%)
- UI Framework: Jetpack Compose BOM 2026.03.00 (Modern declarative UI with Material Design 3)
- Architecture: MVVM with Repository pattern for clean separation of concerns
- Build System: AGP 9.1.0, Gradle 8.0+, JDK 11+
- Networking:
- Retrofit 3.0.0 (Type-safe REST API calls)
- OkHttp 5.3.2 (HTTP client with interceptor support and logging)
- Gson 2.13.2 (JSON parsing and serialization)
- Coroutines (Asynchronous programming)
- Camera & ML:
- CameraX 1.5.3 (Modern camera API with preview and analysis)
- ML Kit Barcode Scanning 17.3.0 (On-device QR/Barcode recognition)
- ZXing Core 3.5.4 (QR code and barcode generation)
- Data Visualization:
- Canvas API (Custom line graphs and charts)
- Real-time rendering with Compose recomposition
- Background Processing:
- Foreground Services (Speed tests and continuous monitoring)
- Coroutines (Parallel processing and async operations)
- Data Persistence:
- SQLite (IP lookup history storage)
- SharedPreferences (Language settings, ad usage tracking)
- Navigation: Jetpack Navigation Compose 2.9.7 with type-safe sealed class routes (139 destinations)
- Minimum SDK: Android 7.0 (API 24) - Wide device compatibility
- Target SDK: Android 16 (API 36) - Latest Android features
- Compilation SDK: 36 (Android 16)
- Transit & Open Data:
- GTFS Realtime Bindings (Protocol Buffers parsing for real-time transit feeds)
- Protobuf Java 4.x (Binary protocol buffer deserialization)
- WebView + Leaflet.js (Interactive OpenStreetMap display with markers and polylines)
- Built-in FileParser (XLSX via ZIP+XML, CSV/TSV, HTML table extraction — zero external dependencies)
- CKAN API integration (Ireland, Sarawak open data portals)
- WebViewAssetLoader (local asset serving for map tiles)
- Image Loading: Coil 2.7.0 (Efficient image loading with SVG support and caching)
- Monetization: Google AdMob (Non-intrusive banner ads with usage-based interstitial and rewarded ads)
CV Toolkit ships a custom diagnostic-tool design language built on top of Material Design 3. The full system lives under app/src/main/java/cv/toolkit/ui/:
ui/
├── theme/
│ ├── Color.kt ─ Brand palette + semantic latency / chart tokens
│ ├── Type.kt ─ Full M3 type scale + MonoText (Display/Title/Body/Label)
│ ├── Shape.kt ─ Tighter corner radii (6 / 10 / 14 / 18 / 24 dp)
│ └── Theme.kt ─ Light + dark schemes, edge-to-edge system bars
├── components/
│ └── Components.kt ─ Reusable primitives (see below)
└── UpdateDialog.kt
| Role | Light | Dark | Use |
|---|---|---|---|
| Primary | SignalCyan40 |
SignalCyan70 |
Action accents, links, selected tabs |
| Secondary | TerminalGreen40 |
TerminalGreen60 |
Positive status, completion |
| Tertiary | Amber40 |
Amber60 |
Warnings, callouts |
| Surface | Paper100/99/97 |
Ink05/10/15/20/25 |
Containers, cards, sheets |
| Outline | Paper70/90 |
Ink25/50 |
Borders, dividers |
Dynamic color (Material You) is opt-in so the brand identity stays consistent across devices and screenshots.
Instead of inline hex literals, screens pull from semantic tokens declared in Color.kt:
| Token | Use |
|---|---|
LatencyExcellent / Good / Fair / Poor / Unknown |
Ping, CDN, DNS, SSL status badges |
ChartPalette (8 hues) |
Multi-series line / bar charts |
A latencyColor(ms) helper in ui/components/Components.kt returns the right token for a latency reading.
MonoText styles (Display / Title / Body / Label) deliver tabular numerics for stats, latency, IPs, hashes, hex dumps, byte counters and version strings. UI chrome uses FontFamily.SansSerif.
Common primitives in ui/components/Components.kt:
SectionHeader(label, count)— "▸ NETWORK TOOLS [16]" terminal-style headerFlagSectionHeader(label, flagPainter, count)— country-grouped section headerMonoCountChip(count)— small monospace count pillStatusBadge(text, tone)— dot + mono pill for stats and statusesStatTile(label, value, icon, tone)— outlined stat card with mono valueToolScaffold(title, onBack, actions, content)— consistent tool-screen wrapperMonoTag(text)— tiny caps mono label (e.g.RTT,TTL,AS#)
- Custom Diagnostic-Tool Design Language - Distinctive technical aesthetic built on Material Design 3: SignalCyan primary, TerminalGreen secondary, Amber tertiary with deep "ink" dark surfaces and warm "paper" light surfaces
- Monospaced Numerics - IP addresses, hashes, latency readings, byte counters and version strings render in monospace for clean column alignment
- Outlined Card Grid - Dense, scannable tool grid with tinted icon squares, mono section counts and "▸ SECTION" terminal-style headers
- Tab Pills with Mono Counts - Compact scrollable category switcher with per-tab tool counts
- Adaptive Light & Dark Themes - Cohesive light and dark palettes; system-bar icon contrast follows background luminance automatically
- Edge-to-Edge Layout - Transparent system bars across all screens
- Semantic Latency Tokens - Centralized
latencyColor()helper (Excellent/Good/Fair/Poor) drives status badges across CDN, Ping, DNS, and SSL tools - Reusable Design Components - Shared
SectionHeader,StatusBadge,StatTile,ToolScaffold,MonoTagprimitives keep all 139 screens visually consistent - Responsive Layout - Optimized for all screen sizes and orientations
- Smooth Animations - Polished transitions and interactions
- Real-time Updates - Live data visualization without page refreshes
- Provider Logos - Visual identification with official brand logos
- Intuitive Navigation - Easy-to-use interface with logical organization
- Copy & Share - One-tap actions for results and data
- Search & Filter - Quickly find what you need across 311+ regions
CV Toolkit supports 18 languages:
| Language | Code | Language | Code |
|---|---|---|---|
| 🇬🇧 English | en | 🇨🇳 简体中文 | zh-CN |
| 🇹🇼 繁體中文 | zh-TW | 🇯🇵 日本語 | ja |
| 🇰🇷 한국어 | ko | 🇩🇪 Deutsch | de |
| 🇪🇸 Español | es | 🇫🇷 Français | fr |
| 🇮🇹 Italiano | it | 🇧🇷 Português | pt-BR |
| 🇷🇺 Русский | ru | 🇹🇷 Türkçe | tr |
| 🇮🇳 हिन्दी | hi | 🇹🇭 ไทย | th |
| 🇻🇳 Tiếng Việt | vi | 🇮🇩 Indonesia | id |
| 🇲🇾 Melayu | ms | 🇸🇦 العربية | ar |
A focused release: zero new tools, every screen redesigned. The app moves from the stock Material You purple template to a custom, distinctive brand identity inspired by terminal / network-diagnostic tools, plus a long-standing Speed Test bug is fixed.
New design language across all 139 screens:
| Area | Before | After |
|---|---|---|
| Palette | Stock Material You purple | SignalCyan primary · TerminalGreen secondary · Amber tertiary · Ink/Paper neutrals |
| Dynamic color | Default on (Material You) | Opt-in — consistent brand on every device |
| Typography | Single overridden style | Full M3 scale + MonoText (Display / Title / Body / Label) for numerics |
| Shapes | M3 defaults | Tighter radii (6 / 10 / 14 / 18 / 24 dp) |
| System bars | Solid surface colors | Edge-to-edge with auto icon contrast |
| Home cards | Square elevated 2-up grid | Dense outlined cards with tinted icon squares |
| Section headers | Plain bold text | "▸ SECTION" terminal headers + mono count chips |
| Tabs | M3 scrollable tab row | Scrollable pill bar with icons + mono counts |
Component library — new ui/components/ package with SectionHeader, FlagSectionHeader, MonoCountChip, StatusBadge, StatTile, ToolScaffold, MonoTag, plus a latencyColor() helper that returns semantic latency tokens (LatencyExcellent / Good / Fair / Poor / Unknown) — usable across every tool screen instead of inline hex literals.
Redesigned screens — Home (brand top bar with mono tagline · outlined card grid · pill tabs · terminal-style section headers · refined Privacy/About dialogs and empty-results state) · Settings (section headers · outlined row cards with tinted icon containers · mono English-name subtitle for languages) · Update dialog (mono version + filesize, primary-tinted version label).
Bug fixes:
- Speed Test — custom targets now persist — Targets added via the + button are saved to
SharedPreferences(via newSpeedTestTargetsManager, Gson-encoded) and survive both navigation away from the screen and full app restart. Built-in targets stay protected; custom targets gain a trash-icon delete button in the dropdown that falls back to the first default if the currently-selected target is removed.
Internal changes:
- New
ui/theme/Shape.kt,ui/components/Components.kt,data/SpeedTestTargetsManager.kt - Removed deprecated
Window.statusBarColor/Window.navigationBarColorcalls in favor ofenableEdgeToEdge()+WindowInsetsControllerCompat.isAppearanceLightStatusBars
New Malaysia Open Data Tools (22 tools):
- Weather - Real-time weather forecasts, severe weather warnings, and earthquake information from Malaysia's official API
- Birthday Explorer - Discover the number of births on any date in Malaysia with data spanning 1920–2022
- Data Catalogue - Browse Malaysia's open data catalogue organized by demography, economy, households, and more
- Immigration - International arrivals to Malaysia by country with monthly trends and breakdowns
- Fuel Price - Historical RON95, RON97, and diesel prices with weekly change data and trend charts
- Population - State-level population statistics with bar charts, sorting, and year-by-year comparison
- Exchange Rate - BNM exchange rates for MYR against 15+ currencies with trend visualization
- CPI & Inflation - Consumer Price Index and inflation rate trends
- COVID-19 - Case statistics by state with new/active/recovered/imported case tracking
- Crime Statistics - Crime data by category with yearly trends and national summary
- Transport Ridership - Public transit ridership for LRT, MRT, Monorail, KTM, and ETS services
- Births & Deaths - Annual demographic trends with births vs deaths line charts and natural growth analysis
- Marriage Statistics - Marriage trends with annual counts, rates, and peak year analysis
- Household Income - State-level income comparison with mean/median income, expenditure, and interactive sorting
- GDP & GNI - Economic growth with real GDP/GNI trends, per-capita analysis, and YoY growth %
- Labour Market - Monthly employment stats with color-coded unemployment rate and labour force breakdown
- Blood Donations - Daily donation tracking with rolling averages and monthly aggregation charts
- Interest Rates - OPR, base rate, FD, and savings rate trends with multi-line comparison
- Electricity Consumption - Sector-level consumption (residential, commercial, industrial) with trend charts
- EPF Dividend - Historical conventional and shariah dividend rates with trend visualization
- Vehicle Registrations - Monthly car registration trends with averages and peak analysis
- Transit Tracker - Real-time public transport tracking on an interactive OpenStreetMap with GTFS Realtime protobuf parsing, 15 transit agencies, vehicle route tracing with polyline trails, user geolocation, and 30-second auto-refresh
New Device Tools (5 tools):
- Battery Info - Real-time battery level, health, temperature, voltage, and charging status with auto-refresh
- Display Info - Screen resolution, density, refresh rates, and HDR capability detection
- Storage Analyzer - Visual storage breakdown by category with ring charts and RAM analysis
- Bluetooth Scanner - Discover nearby Bluetooth devices with RSSI, device type, and BLE/Classic support
- GPS Location - Live GPS tracking with coordinates, address, altitude, speed, and satellite info
New Media & Image Tools (5 tools):
- Image Background Remover - Remove backgrounds by color selection with adjustable threshold and side-by-side preview
- Image Filters - Apply visual filters and effects to images
- Image Rotate/Flip - Quick rotation (90°/180°/270°) and horizontal/vertical flip
- Meme Generator - Create memes with customizable text overlays on images
- Screenshot Stitcher - Combine multiple screenshots into a single long vertical image
New Converters & Calculators (5 tools):
- Number Base Converter - Convert between decimal, binary, hex, octal, and custom bases
- Currency Converter - Live exchange rates for 30+ currencies with conversion
- Aspect Ratio Calculator - Calculate and scale dimensions with common presets
- Date Calculator - Days between dates, add/subtract periods, and age calculation
- Scientific Calculator - Trigonometric, logarithmic, and advanced math functions with history
New Productivity & Text Tools (4 tools):
- Random Generator - Generate random numbers, strings, colors, UUIDs, and dice rolls
- Text Case Converter - Convert between uppercase, lowercase, title case, and more
- Pomodoro Timer - Time-boxed work/break intervals for focused productivity
- Note Pad - Quick and simple note-taking utility
Network (1 tool):
- Network Stress Test - Quick-access hub for network performance diagnostics
New Singapore OpenData Tools (11 tools):
- SG Weather - 24-hour, 2-hour area, and 4-day weather forecasts from NEA
- SG Air Quality - PSI, PM2.5, UV Index by region with color-coded indicators
- SG Environment - Real-time temperature, rainfall, humidity, wind from 50+ stations with bar charts
- SG Heat Stress (WBGT) - Wet Bulb Globe Temperature from 15 stations with heat stress levels
- SG Lightning - Real-time lightning strikes on an interactive OpenStreetMap
- SG Flood Alerts - Active flood warnings from PUB with severity and area info
- SG Taxi Availability - Live taxi positions on OpenStreetMap with regional summary
- SG Carpark - Real-time HDB carpark availability with search, sort, and occupancy bars
- SG Traffic Cameras - Live traffic camera images in grid with tap-to-expand
- SG IP Applications - Design and patent lookup by date from IPOS
- SG Data Catalogue - Browse 5,000+ datasets, each as a dedicated page with auto-charts, stats, search, filter, and sort
New Ireland OpenData (1 tool):
- IE Data Catalogue - Browse 21,900+ Irish government datasets with theme filters, dedicated viewer pages with auto-charts, and multi-format file parsing (XLSX, CSV, HTML, JSON) with WebView fallback
New Sarawak OpenData (1 tool):
- Sarawak Data - Browse 200+ Sarawak state government datasets with dedicated viewer pages and multi-format file parsing
Universal Data File Parser:
- Built-in parser handles XLSX (Excel), CSV, TSV, HTML tables, and JSON — no external dependencies
- XLSX parsing via Android's built-in ZIP + XML libraries
- HTML table extraction with tag stripping and entity decoding
- WebView fallback for web-based datasets that don't contain tabular data
- All parsed data displayed with auto-generated charts, summary statistics, search, filter, and sort
New Media & Image Tools (3 tools):
- GIF Maker - Create animated GIFs from selected images or convert video clips to GIF. Features configurable frame delay/FPS, adjustable output width, frame preview thumbnails, and video frame extraction (up to 30 frames)
- Photo Collage - Arrange 2-6 photos into beautiful layouts with 7 templates (2 Side, 2 Stack, 3 Left, 3 Top, 4 Grid, 3 Row, 6 Grid). Customizable padding, output size (540-2160px), and 8 background color options with center-crop fitting
- Image Watermark - Add text or image watermarks with full customization: text size/color/opacity/rotation, image scale/opacity, 9-point position grid, and tiled pattern mode for repeating watermarks across the entire image
New Device Tool (1 tool):
- NFC Reader - Read and display NFC tag contents with automatic tag type detection (MIFARE Classic/Ultralight, ISO 14443, FeliCa, ISO 15693), NDEF record parsing (URI, text, MIME), tag ID, technology list, writable status, max size, and copy-to-clipboard support
New Image & Media Tools (7 tools):
- Image Resizer - Resize images to exact dimensions with 12 social media presets and 10 common size presets, aspect ratio locking
- Image Cropper - Crop images with 10 aspect ratio presets, visual overlay with rule-of-thirds grid and corner handles
- Image Format Converter - Convert between JPEG, PNG, WebP (Lossy/Lossless), and BMP with quality slider
- EXIF Viewer - View all EXIF metadata (camera, shooting settings, GPS, dates, copyright) organized by category
- EXIF Remover - Batch strip EXIF data from images for privacy protection
- Color Picker - Tap on any image to extract colors with HEX, RGB, RGBA, HSL values and color history
- Favicon Generator - Generate favicons in 15 standard sizes (16x16 to 512x512) for websites and apps
New PDF Tools (3 tools):
- PDF Split - Split PDFs by page range or select individual pages with visual thumbnails
- PDF to Image - Extract pages as PNG/JPEG at configurable DPI (72-300)
- PDF Password - Add 128-bit encryption or remove password protection with configurable permissions
PDF Merge Improvements:
- Multi-select PDF import - select multiple PDFs at once instead of adding one by one
- Drag-to-reorder - long press and drag to rearrange PDF order
- Full page preview - swipe through all pages before saving the merged PDF
Image to PDF Improvements:
- Image Rotation - rotate any image 90°/180°/270° before conversion with one tap
- Visual Crop Editor - crop images with draggable corner handles, dark overlay preview, and rule-of-thirds grid
- Drag-to-reorder - long press and drag to rearrange image order
- Full page preview - swipe through all pages with settings applied before exporting
- Preview shows all pages (not just the first) with page counter and swipe navigation
The CDN & Cloud Latency Test has been completely redesigned with professional-grade features:
🎯 Real-time Line Graphs
- Multi-color line charts showing latency trends over time
- Support for monitoring 35+ regions simultaneously
- Auto-scaling Y-axis with grid lines
- Time-series X-axis with mm:ss timestamps
- Smooth animations and responsive updates
📊 Continuous Monitoring
- Configurable ping intervals (1s, 2s, or 5s)
- Background service support for uninterrupted testing
- Add/remove regions on-the-fly without stopping monitoring
- Batch monitoring for all regions in a provider
📈 Advanced Statistics
- Per-region statistics cards with color-coded latency badges:
- 🟢 Green: < 50ms (Excellent)
- 🟡 Yellow: 50-100ms (Good)
- 🟠 Orange: 100-200ms (Fair)
- 🔴 Red: ≥ 200ms (Poor)
- Comprehensive metrics: Sent count, Packet loss %, Min/Max/Avg latency, Jitter
- Historical tracking: Last 30 data points per region
- Graph legend: Color-coded region identification
🌐 Edge Detection
- Automatically detects your CDN edge location
- Shows Cloudflare, CloudFront, and Alibaba Cloud connections
- Visual provider logos for easy identification
✨ UI Improvements
- Provider logos for all 14 cloud providers
- Sort by latency, name, or location
- Search and filter across 311+ regions
- Export results for documentation
- Responsive Material Design 3 interface
Screenshots are pending the V10 design refresh — drop the new captures into
docs/screenshots/and link them here:<div align="center"> <img src="docs/screenshots/home.png" width="240" /> <img src="docs/screenshots/cdn-latency.png" width="240" /> <img src="docs/screenshots/settings.png" width="240" /> </div>
- Android Studio: Meerkat (2024.3) or later recommended
- Android SDK: API 24 (Android 7.0) or higher
- AGP: 9.1.0+
- Kotlin: 2.3.20+
- Gradle: 8.0+
- JDK: Java 11 or higher
- Clone the repository:
git clone https://github.com/osscv/CV-Toolkit.git
cd CVToolkit-
Open the project in Android Studio
- Select "Open an Existing Project"
- Navigate to the cloned directory
- Android Studio will automatically detect the project
-
Sync Gradle dependencies
- Android Studio will prompt to sync
- Or manually: File → Sync Project with Gradle Files
-
Configure AdMob (Optional)
- The app includes AdMob integration
- AdMob ID is in
AndroidManifest.xml - Replace with your own ID if publishing your own version
-
Build and run
- Connect your Android device or start an emulator
- Click Run (▶) or press Shift+F10
Debug Build:
./gradlew assembleDebugRelease Build:
./gradlew assembleReleaseInstall on Device:
./gradlew installDebugRun Tests:
./gradlew testAPK Location:
- Debug:
app/build/outputs/apk/debug/app-debug.apk - Release:
app/build/outputs/apk/release/app-release.apk
- Lookup your current IP or any custom IP address
- Get detailed information: location, ISP, ASN, timezone
- History tracking with timestamps stored locally
- Uses dkly DATAHUB API
Comprehensive Provider Coverage:
- 311+ Test Regions across 14 Major Providers:
- Azure (46 regions)
- AWS (30+ regions)
- Google Cloud Platform (40+ regions)
- Alibaba Cloud (23 regions)
- Oracle Cloud (20 regions)
- DigitalOcean (15 regions)
- Vultr (32 regions)
- Linode (12 regions)
- Lightsail (11 regions)
- Hetzner (6 regions)
- OVH (17 regions)
- Fastly (18 regions)
- Tencent Cloud (15 regions)
- Huawei Cloud (12 regions)
Edge Location Detection:
- Automatically detects your nearest CDN edge location
- Shows Cloudflare, CloudFront, and Alibaba Cloud edge servers
- Displays real-time connection information
Real-time Monitoring & Graphing:
- Live Line Graph - Visualize latency trends over time with multi-color line charts
- Continuous Ping Mode - Monitor multiple regions simultaneously
- Configurable Intervals - Choose between 1s, 2s, or 5s ping intervals
- Multi-region Tracking - Monitor up to 35+ regions at once with color-coded lines
- Auto-scaling Graph - Dynamic Y-axis scaling based on latency values
- Time-series Display - X-axis shows timestamps with mm:ss format
Detailed Statistics:
- Current Latency - Real-time latency with color indicators (Green < 50ms, Yellow < 100ms, Orange < 200ms, Red ≥ 200ms)
- Min/Max/Avg - Comprehensive latency statistics
- Jitter - Network stability measurement (variance between consecutive pings)
- Packet Loss - Percentage of failed ping attempts
- Sent Count - Total number of ping attempts
- Historical Data - Stores last 30 data points per region
Advanced Features:
- Provider Logos - Visual provider identification with official logos
- Sort Options - Sort by latency, name, or location
- Search & Filter - Quickly find specific regions
- Export Results - Share and save test results
- Add/Remove Monitoring - Dynamically add or remove regions from monitoring
- Background Service - Continue testing even when app is minimized
- Statistics Cards - Individual stat cards for each monitored region with color-coded badges
- Fast Network Scanning - Discover all devices on your local network
- MAC Address Lookup - Identify device manufacturers automatically
- Parallel Scanning - Multi-threaded scanning for faster results
- Device Details - IP address, MAC address, hostname, and manufacturer
- Export Functionality - Save device list for documentation
- Real-time Updates - See devices as they're discovered
- Comprehensive Port Scanning - Scan any port range (1-65535)
- Common Ports Preset - Quick scan of well-known service ports
- Service Detection - Automatic identification of services (HTTP, FTP, SSH, etc.)
- Parallel Scanning - Multi-threaded for faster results
- Timeout Configuration - Adjustable connection timeouts
- Export Results - Save scan reports for security audits
- ML Kit Powered - Google's machine learning for accurate scanning
- Multiple Format Support - QR Code, EAN-8, EAN-13, UPC-A, UPC-E, Code 39, Code 93, Code 128, ITF, Codabar, Aztec, Data Matrix, PDF417
- Real-time Camera Preview - Instant scanning with visual feedback
- Automatic Detection - No need to press buttons, auto-detects codes
- Smart Actions - Automatic URL opening, contact adding, Wi-Fi connecting
- Scan History - Keep track of all scanned codes with timestamps
- Copy to Clipboard - One-tap copy of scanned content
- Flashlight Support - Scan in low-light conditions
-
Network Troubleshooting
- Use Ping Test to verify host connectivity
- Run Traceroute to identify routing issues
- Scan network with Device Discovery to find unauthorized devices
- Check DNS resolution with DNS Lookup
-
Infrastructure Monitoring
- Monitor cloud regions with CDN Latency Test's continuous mode
- Track jitter and packet loss for quality assessment
- Export results for reports and documentation
-
Security Audits
- Scan ports to identify exposed services
- Check SSL certificates for expiration and validity
- Verify DNS records and configurations
-
Multi-region Latency Testing
- Test all AWS/Azure/GCP regions simultaneously
- Compare provider performance from your location
- Identify optimal regions for deployment
-
Performance Monitoring
- Set up continuous monitoring for critical regions
- Track latency trends over time with graphs
- Analyze jitter and stability metrics
-
API Development
- Test HTTP headers and responses
- Build custom HTTP requests with headers
- Decode JWT tokens for debugging
- Generate test data (UUIDs, passwords, QR codes)
-
Data Processing
- Encode/decode Base64 strings
- Calculate hash values (MD5, SHA)
- Convert between formats (hex, binary, ASCII)
- Parse and analyze user agent strings
- Visualize how network routing works (Traceroute)
- Understand DNS resolution process
- Learn about subnet calculations and IP addressing
- Explore different encoding formats
- See real-time network latency across the globe
Your Privacy Matters:
- ✅ All data processing is performed locally on your device
- ✅ No data is uploaded to our servers or any external servers
- ✅ Network scans, device information, and lookup results stay on your phone only
- ✅ IP lookup history is stored locally only
- ✅ No personal data collection, storage, or transmission
- ✅ Transparent and well-documented
Permissions Used:
INTERNET- Required for network diagnostics, IP lookups, DNS queriesACCESS_NETWORK_STATE- Detect current network configurationCAMERA- QR/Barcode scanning and camera info (optional feature)FOREGROUND_SERVICE/FOREGROUND_SERVICE_DATA_SYNC- Background speed tests and continuous monitoringPOST_NOTIFICATIONS- Speed test progress notificationsACCESS_WIFI_STATE/CHANGE_WIFI_STATE- WiFi analysis featuresACCESS_FINE_LOCATION/ACCESS_COARSE_LOCATION- Location-based network featuresREQUEST_IGNORE_BATTERY_OPTIMIZATIONS- Sustained speed testingNFC- NFC tag reading (optional feature)
Advertising:
- This app displays ads via Google AdMob
- Google may collect data for personalized advertising
- Refer to Google's Privacy Policy for details
This app is designed for legitimate network diagnostics, troubleshooting, and educational purposes only.
Please Note:
- Only use network scanning tools on networks and devices you own or have explicit permission to test
- Unauthorized network scanning or port scanning may be illegal in your jurisdiction
- The app is provided "as is" without warranty
- The developer is not responsible for misuse or any legal issues arising from use of this app
Contributions are welcome! Please feel free to submit a Pull Request.
- Fork the project
- Create your feature branch (
git checkout -b feature/AmazingFeature) - Commit your changes (
git commit -m 'Add some AmazingFeature') - Push to the branch (
git push origin feature/AmazingFeature) - Open a Pull Request
By contributing to this project, you agree to:
- Maintain all existing author attributions and copyright notices
- Not remove or modify credits to the original author (Khoo Lay Yang)
- Keep the "About Author" section intact in the application
- Preserve all copyright and attribution information in documentation
All contributions will be reviewed to ensure compliance with these requirements.
Copyright © 2024-2026 Khoo Lay Yang. All Rights Reserved.
This project is proprietary software. Unauthorized copying, distribution, modification, or use of this software is prohibited without explicit permission from the author.
IMPORTANT: If you use, fork, or modify this repository, you MUST:
-
Keep all author attribution intact - Do not remove or modify:
- The copyright notice "Copyright © 2024-2026 Khoo Lay Yang"
- Author information (Name: Khoo Lay Yang, Website: www.dkly.net)
- "Made with ❤️ by Khoo Lay Yang" footer in the README
- Author credits in the app's "About Author" section
-
Maintain the original author credits in any:
- Documentation files (README, LICENSE, etc.)
- Source code headers or comments
- Application UI/About screens
- Derivative works or forks
-
Give appropriate credit when:
- Sharing or distributing the app
- Creating derivative works
- Using code snippets or substantial portions
- Publishing modified versions
Removal or modification of author attribution is strictly prohibited and constitutes a violation of the copyright.
For commercial use, licensing inquiries, or permission requests, please contact: www.dkly.net
Khoo Lay Yang
- Website: www.dkly.net
Feel free to open an issue on GitHub for:
- 🐛 Bug reports
- 💡 Feature requests or suggestions
- ❓ Questions about functionality
- 🔧 Technical issues
- Jetpack Compose - Modern Android UI toolkit
- Retrofit - Type-safe HTTP client
- ZXing - QR code generation
- ML Kit - Barcode scanning
- CameraX - Camera API
- Coil - Image loading with SVG support
- OkHttp - HTTP client
- AndroidX ExifInterface - EXIF metadata reading
- PDFBox Android - PDF encryption and password protection
- dkly DATAHUB - IP lookup services
- All cloud providers for their global infrastructure
- 133 Professional Tools organized into 5 tabs (All / Network / Utility / Device / OpenData with 4 countries) across 139 screens
- 311+ Global Test Regions across 14 cloud/CDN providers
- Real-time Monitoring with live graphs and continuous ping
- Advanced Analytics — Min / Max / Avg / Jitter / Packet Loss tracking
- 100% Local Processing — Your data stays on your device
- Custom Diagnostic-Tool UI built on Material Design 3 + Jetpack Compose (V10 refresh)
- Zero Server Dependencies for core functionality
- Multi-region Support — Monitor 35+ regions simultaneously
- Professional Grade — Network diagnostics used by IT professionals
- Privacy First — No data collection, no tracking
- 18 Languages — Global localization support
Made with ❤️ by Khoo Lay Yang
⭐ Star this repo if you find it useful!