CV Toolkit

A Comprehensive Network Diagnostics & Utility Toolkit for Android

⚠️ IMPORTANT: If you use this repository, you MUST keep all author attribution intact.
DO NOT REMOVE the author credits. See License & Attribution for details.

📱 About

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 + Jetpack Compose), it delivers 40+ powerful tools 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

🌟 Feature Highlights

🚀 Advanced CDN & Cloud Latency Testing

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

📱 40+ Professional Tools

Everything you need for network diagnostics, development, and system analysis in one app.

🔒 Privacy-First Design

Zero data collection
No server uploads
100% local processing
Open and transparent

✨ Key Features

🌐 Network Tools (13 Tools)

Speed Test - Comprehensive internet speed testing with download/upload speeds, ping latency, jitter measurement, and historical tracking. Foreground service support for uninterrupted testing
Ping Test - ICMP ping testing with packet count configuration, timeout settings, and detailed statistics (min/max/avg/packet loss)
Traceroute - Visual network path tracing showing all hops with latency measurements and geographic information
Port Scanner - Scan for open ports on any host
Network Scanner (Device Discovery) - Discover all devices connected to your network
IP Lookup - Get detailed geolocation and ISP information for any IP address
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
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

🛠️ Utility Tools (23 Tools)

Encoders & Decoders:

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

Security & Cryptography:

Hash Generator - Generate MD5, SHA-1, SHA-256, 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
File Hash Calculator - Calculate MD5, SHA, CRC32 hashes for files with metadata

QR Codes & Barcodes:

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

Text & Data Tools:

Text Counter - Count words, characters, lines, and paragraphs
Text Diff - Compare two texts and highlight differences
IP Calculator - Convert between different IP formats
Color Converter - Convert between HEX, RGB, HSL, and CMYK color formats

Time & ID Tools:

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

Measurement:

Unit Converter - Convert length, weight, temperature, and data sizes

Utility:

Stopwatch - Timer with lap functionality
User Agent Parser - Parse and analyze browser User-Agent strings

📱 Device Tools (3 Tools)

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

🏗️ Technical Stack

Language: Kotlin (100%)
UI Framework: Jetpack Compose (Modern declarative UI with Material Design 3)
Architecture: MVVM with Repository pattern for clean separation of concerns
Networking:
- Retrofit 2 (Type-safe REST API calls)
- OkHttp (HTTP client with interceptor support)
- Gson (JSON parsing and serialization)
- Coroutines (Asynchronous programming)
Camera & ML:
- CameraX (Modern camera API with preview)
- ML Kit Barcode Scanning (On-device QR/Barcode recognition)
- ZXing (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)
Navigation: Jetpack Navigation Compose with type-safe routes
Minimum SDK: Android 7.0 (API 24) - Wide device compatibility
Target SDK: Android 14 (API 36) - Latest Android features
Image Loading: Coil (Efficient image loading with caching)
Monetization: Google AdMob (Non-intrusive banner ads)

🎨 UI/UX Features

Material Design 3 - Modern, beautiful interface following Google's latest design guidelines
Dynamic Theming - Adapts to system theme (Light/Dark mode)
Responsive Layout - Optimized for all screen sizes and orientations
Smooth Animations - Polished transitions and interactions
Color-Coded Indicators - Visual feedback for latency quality and status
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

🆕 What's New - Latest Updates

Real-time CDN Monitoring Revolution 🚀

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

[Screenshot 1: Main Screen]  [Screenshot 2: Network Tools]  [Screenshot 3: Utility Tools]

🚀 Getting Started

Prerequisites

Android Studio: Hedgehog (2023.1.1) or later recommended
Android SDK: API 24 (Android 7.0) or higher
Kotlin: 1.9+
Gradle: 8.0+
JDK: Java 11 or higher

Installation

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

Build Commands

Debug Build:

./gradlew assembleDebug

Release Build:

./gradlew assembleRelease

Install on Device:

./gradlew installDebug

Run Tests:

./gradlew test

APK Location:

Debug: app/build/outputs/apk/debug/app-debug.apk
Release: app/build/outputs/apk/release/app-release.apk

📦 Features Breakdown

IP Lookup with History

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

CDN & Cloud Latency Testing - Advanced Real-time Monitoring

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

Network Scanner (Device Discovery)

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

Port Scanner

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

QR/Barcode Scanner

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

💡 Use Cases & Examples

For Network Administrators

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

For Cloud Engineers

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

For Developers

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

For Students & Learning

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

🔒 Privacy & Security

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
✅ Open source and transparent

Permissions Used:

INTERNET - Required for network diagnostics, IP lookups, DNS queries
ACCESS_NETWORK_STATE - Detect current network configuration
CAMERA - QR/Barcode scanning (optional feature)
FOREGROUND_SERVICE - Background speed tests
POST_NOTIFICATIONS - Speed test progress notifications

Advertising:

This app displays ads via Google AdMob
Google may collect data for personalized advertising
Refer to Google's Privacy Policy for details

⚠️ Responsible Use

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

🤝 Contributing

Contributions are welcome! Please feel free to submit a Pull Request.

Contribution Guidelines

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

⚠️ Important Note for Contributors

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.

📝 License & Attribution

This project is proprietary software. Unauthorized copying, distribution, modification, or use of this software is prohibited without explicit permission from the author.

⚠️ Attribution Requirements

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 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

👨‍💻 Author

Khoo Lay Yang

Website: www.dkly.net

📞 Support

Feel free to open an issue on GitHub for:

🐛 Bug reports
💡 Feature requests or suggestions
❓ Questions about functionality
🔧 Technical issues

🙏 Acknowledgments

Jetpack Compose - Modern Android UI toolkit
Retrofit - Type-safe HTTP client
ZXing - QR code generation
ML Kit - Barcode scanning
CameraX - Camera API
dkly DATAHUB - IP lookup services
All cloud providers for their global infrastructure

📊 Statistics

40+ Professional Tools organized into 3 categories
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
Modern UI with Material Design 3 and Jetpack Compose
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

Made with ❤️ by Khoo Lay Yang

⭐ Star this repo if you find it useful!

Name		Name	Last commit message	Last commit date
Latest commit History 9 Commits
.idea		.idea
app		app
gradle		gradle
.gitignore		.gitignore
README.md		README.md
build.gradle.kts		build.gradle.kts
gradle.properties		gradle.properties
gradlew		gradlew
gradlew.bat		gradlew.bat
local.properties		local.properties
settings.gradle.kts		settings.gradle.kts

osscv/CV-Toolkit

Folders and files

Latest commit

History

Repository files navigation