So I decided to make one. Or two in fact – I've made an iOS version and an Android version, because I happen to know programming on both platforms.
NumberPad is an experimental prototype to explore how we write, visualize, and manipulate math equations.
Currency Converter - Free and Quick Converter calculates money quick and easy way to see live foreign exchange rates.
This is an open source app made to help home brewers brew their coffee by calculating a the grams of water needed, and run a timer all in the same screen.