A privacy-first Android app that detects manipulative design patterns in screenshots and websites using on-device AI (Gemini Nano), with zero sensitive data leaving your device.
- Screenshot Analysis: Share a screenshot directly to the app for instant analysis.
- Website Analysis: Enter a URL to analyze live website content without taking screenshots.
- Dual-Engine Detection: Uses Gemini Nano for multimodal on-device analysis on supported devices. Other devices automatically use an OCR and pattern-matching fallback.
- Privacy-First: Analysis is performed 100% on-device. Screenshots are held in memory only and never saved to disk.
- 📸 Take a screenshot of a suspicious app or website.
- 📤 Tap Share → Dark Pattern Detector.
- 🧠 The app analyzes the visual elements on-device.
- 📊 View detected patterns with confidence scores.
- 🔗 Paste a website URL into the app's home screen.
- 🌐 The app loads the site in a local WebView and extracts text context.
- 🧠 Gemini Nano (or the Regex fallback) processes the text to identify deceptive language.
- ✅ On-Device Analysis: AI inference, OCR, and pattern matching run locally via Android's AICore and ML Kit.
- ℹ️ Website Loading Uses the Network: An entered URL is loaded from its website before the extracted text is analyzed locally.
- ✅ Ephemeral Storage: Screenshots are never written to disk or sent to a server.
- ✅ Secure Web Loading:
INTERNETpermission is used strictly to load the requested URL in a local WebView for text extraction. No browsing data or history is collected.
| Layer | Technology |
|---|---|
| Language | Kotlin (2.4.0) |
| UI | Jetpack Compose (Material 3) |
| AI (Multimodal + Text) | ML Kit GenAI Prompt API |
| Fallback | ML Kit OCR + Pattern Matching |
| Build System | Gradle 9.6.1 + Compose Compiler |
- Open the project in Android Studio.
- Ensure you have the Android SDK 37 and Kotlin 2.4.0 configured.
- Sync Gradle and run on your device or emulator.
- Note on Gemini Nano: To test the AI features, you must run the app on a physical, supported device (e.g., Pixel 8/9, Galaxy S24). On some devices, you may need to enable "AICore Settings" in Developer Options to trigger the model download. Emulators will automatically use the Regex fallback.
| Category | Example |
|---|---|
| Fake Urgency | "Offer ends in 00:05:00!" |
| Fake Scarcity | "Only 2 left in stock!" |
| Fake Social Proof | "15 people viewing this" |
| Confirmshaming | "No thanks, I hate saving money" |
| Hidden Costs | "Service fee: $4.99" |
| Hidden Subscription | "Free trial, then $9.99/month" |
| Nagging | "You left items in your cart!" |
| Hard to Cancel | "Call to cancel your subscription" |
| Preselection | "☑ Sign me up for emails" |
| Trick Wording | "Uncheck to not receive emails" |
| Forced Action | "Sign up to continue reading" |
| Sneaking | "Insurance added to cart" |
MIT