Project Overview
Smart Expense Tracker is a cross-platform mobile application designed to simplify expense tracking for freelancers. Users photograph paper receipts, and the app extracts dates, merchant names, tax breakdowns, and final totals, saving them to tax-ready directories.
Key Features & Scope
AI OCR receipt scanning with automatic line-item parsing
Automated tax category mapping matching local tax requirements
Offline receipts queue syncing to Supabase database upon connection
Visual expense breakdown charts with exportable CSV spreadsheets
System Architecture
Mobile app built using React Native and Expo. Optical character recognition (OCR) is performed via Tesseract and OpenAI Vision endpoints on a secure Node.js backend.
Client InterfaceNext.js / React
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Backend CoreNode.js / Express
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Database NodeSupabase Database (PostgreSQL)
Database: Supabase Database (PostgreSQL)
Deployment: Vercel & Supabase Cloud
Performance & Vitals
App Startup Time1.3s
JS Bundle Size5.5 MB
Crash-Free Rate99.97%
Render Frame Rate60 FPS
Verified Production Metrics
Technologies Used
React NativeExpoTesseract OCROpenAI APINode.jsSupabaseTypeScript