Troco: the change calculator for busy counters

Why it surfaced

This is a small tool with a sharply defined job: take the purchase price and amount received, then turn the answer into a practical cash breakdown. Its cashier-focused site reports 10,000+ downloads, a 4.5 Google Play rating, no registration, and use cases ranging from small greengrocers to rideshare drivers.

Troco calculates exact change and shows which notes and coins to hand over, with support for Brazilian real, US dollars, and euros.