SafeLens is an Android fraud-detection application designed to help users identify potentially suspicious phone numbers, URLs, and SMS messages.
The app combines rule-based detection with Google Safe Browsing to provide quick and understandable security checks for potentially fraudulent digital content.
- Validates Indian mobile numbers
- Detects known spam numbers
- Identifies suspicious repeated-number patterns
- Provides instant scan results
- Saves scan results to history
- Checks URLs using Google Safe Browsing API
- Detects potentially dangerous websites
- Displays clear scan results
- Handles API and network errors
- Saves URL scans to history
- Analyzes SMS content for suspicious patterns
- Detects common scam and phishing keywords
- Identifies suspicious links
- Classifies messages as:
- ✅ Safe
⚠️ Potentially Suspicious- 🚨 Highly Suspicious
- Saves analysis results to history
- Stores previous scans locally
- Supports Phone, URL, and SMS scan history
- Delete individual scan records
- Clear complete scan history
- Dark Mode
- Light Mode
- Clean and responsive interface
| Technology | Purpose |
|---|---|
| Kotlin | Primary programming language |
| Jetpack Compose | Modern Android UI |
| Material 3 | UI components and theming |
| Room Database | Local scan history |
| Retrofit | API communication |
| Google Safe Browsing API | URL threat detection |
| Kotlin Coroutines | Asynchronous operations |
| Gson | JSON parsing |
| KSP | Room code generation |
| Android Studio | Development |
| Git & GitHub | Version control |
SafeLens follows a simple layered architecture:
SafeLens
│
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Jetpack Compose
│
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ViewModel
│
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Repository
/ \
/ \
▼ ▼
Room Database Retrofit
│
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Google Safe Browsing
SafeLens has been tested across its major features, including:
-Phone number validation -Spam-number detection -Suspicious number pattern detection -URL scanning -Google Safe Browsing threat detection -SMS analysis -Suspicious keyword detection -Suspicious link detection -Scan history -Individual scan deletion -Clearing scan history -Dark/Light mode -Navigation between screens -Invalid input handling -API/network error handling
-Real-time phone number reputation checking -Machine-learning based SMS classification -Advanced phishing detection -URL reputation scoring -More comprehensive threat intelligence -Push notifications for detected threats -Scan statistics and analytics -Improved offline detection -Backend-based API protection -Multi-language support
SafeLens is an educational and preventive security application.
A result marked Safe does not guarantee that a phone number, message, or website is completely safe.
Security detection systems can produce both false positives and false negatives. Users should independently verify suspicious messages, links, and requests.
Krithi Prakash
Computer Science & Engineering Student
This project is created for educational and portfolio purposes.