Trustit

Trustit is an open-source Flutter and Node.js application for analyzing consumer product labels. Users can scan the front and back of a food, cosmetic, supplement, or household product, then receive an AI-assisted safety breakdown with ingredient-level risk notes, scores, summaries, and scan history.

The project includes a cross-platform Flutter app, an Express backend, OpenAI-powered product analysis, AI chat support, subscription handling, and UI design screenshots.

Screenshots

Features

• Product label scanning with front and back image capture
• AI product analysis for foods, cosmetics, supplements, beverages, and household products
• Ingredient extraction with risk levels and plain-language explanations
• Safety, efficacy, transparency, and overall scoring
• Scan history saved locally with Hive
• AI assistant for ingredient and food-safety questions
• Flutter mobile app with onboarding, paywall, profile, camera, history, and analysis screens
• Express API with image upload, health check, analysis, chat, legal pages, and receipt verification routes
• Local storage, provider-based app state, and route-based app navigation

Tech stack

• Flutter and Dart
• Provider, GoRouter, Hive, Dio, Camera, Image Picker
• Node.js and Express
• OpenAI API for product analysis and chat
• Multer for image uploads
• In-app purchase support

Repository structure

trustlit_app/       Flutter mobile application
trustlit_backend/   Express API and AI analysis backend
ui_designs/         Product and interface screenshots

Getting started

Backend

cd trustlit_backend
npm install
cp .env.example .env
npm run dev

Set the required environment variables in trustlit_backend/.env.

OPENAI_API_KEY=your_openai_api_key
PORT=3000
NODE_ENV=development

Flutter app

cd trustlit_app
flutter pub get
flutter run

The app expects the backend API to be reachable from the configured API service in trustlit_app/lib/services/api_service.dart.

API overview

GET  /api/health
POST /api/analyze
POST /api/ai-chat
POST /api/verify-receipt
GET  /privacy-policy
GET  /terms

Notes

Trustit is designed as a consumer-facing product safety companion. AI analysis should be treated as informational support, not as medical, dietary, or professional safety advice.

License

No license has been selected yet.