A mobile CRM and invoicing app that helps entrepreneurs and WhatsApp/Instagram sellers move from informal to professional invoicing.
Status: 🟢 Live on the App Store (Android version in preparation) · 500+ installs · 4.9★ Origin: built as my final project for Harvard CS50x.
- Professional invoices and client management in one app
- Works fully offline: create and edit without a connection
- Automatic sync when the connection returns
- On-device receipt scanning with OCR
- AI-assisted invoicing
React Native · Expo · TypeScript · expo-sqlite · Supabase (PostgreSQL, Row Level Security) · Tesseract.js
flowchart LR
A[Mobile app] --> B[(Local SQLite)]
A --> D[On-device OCR]
B <-->|sync when online| C[(Supabase / PostgreSQL + RLS)]
- Local-first: all reads and writes hit SQLite, so the app never blocks on the network.
- Sync engine: local changes are pushed to Supabase and remote changes pulled when online.
- Security: Row Level Security on every table, each user only sees their own data.
Product design, architecture, full development and App Store release.
Source code is private. Contact me for a technical walkthrough: nourdevtd@gmail.com