Tip Calculator

overview maintained

I initially made this as a way to learn Android development and see how I liked it, but after researching the competition, I realized that most tip calculators are plastered with ads and have horrible UX. I figured I could do it better.

This Calculator is designed to be fast and be easy to use. It's as simple as opening the app and typing in the bill amount. The tip and total calculate immediately using your saved settings.

It is pretty configurable (see features section below) and has multiple themes to keep everyone happy.

tech stack

Java, Android SDK
DataStore (RxDataStore)
BigDecimal (exact monetary arithmetic)

features

Zero ads, completely free - no ads, no paywalls, no in-app purchases
Four rounding modes - always up, always down, nearest cent, or exact. Useful when rounding direction matters for expense reports or group fairness
Bill splitting - split among up to 99 people and see exactly what each person owes
Persistent settings - remembers your preferred tip %, currency, theme, and rounding mode between sessions so you never reconfigure it
Multiple themes - several preset color themes including Gruvbox and Dracula
Works offline - no internet connection required, ever
Custom numpad - standard or inverted layout, whichever feels natural
Input Types - choose between a slider or quick buttons for tip percent selection

tip calculator

overview maintained

tech stack

links

features

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