Computer Vision · Utility
Coin Counter
The Challenge
Counting large volumes of coins by hand is slow and error-prone — a daily grind for cashiers, small businesses, and collectors. Hardware coin counters solve it, but they are expensive, stationary, and overkill for most users. The idea: turn the phone people already carry into the counting machine.
What We Built
We built a mobile app that uses the device camera and on-device image recognition to identify, classify, and count coins in real time. Point the camera at a pile of coins and the app detects each denomination, keeps a running total, and lets the user save or share counts. The recognition pipeline was tuned for overlapping coins, varied lighting, and worn faces — the messy conditions real users actually shoot in.
- Real-time coin detection and classification through the camera
- Per-denomination totals with saved count history
- On-device processing — works without a connection
- Built for iOS and Android
