Contrigraph vs 20% Tip Calculator

Grow your grass. That's the whole app. "Contrigraph" is short for contribution graph — the GitHub habit of watching squares turn green as you show up. This app takes that feeling and points it at exactly one habit. ■ One habit, on purpose This isn't a multi-habit dashboard. Running, reading, lifting — pick one and track only that. Fewer things to manage is why it sticks. ■ A year-long strip to read your rhythm The band across the top isn't for reading any single day — it's texture. Glance at it and you can tell when you were on a roll and when things slipped, all year at once. Tap it to jump to that month. ■ A month calendar to look back and fix things The calendar is where the real reading (and rewriting) happens. Tap any day, past or present, and cycle its effort. Five honest levels — not counted, not measured: none, a little, okay, solid, perfect. ■ One big button for today No hunting through a grid. Today gets its own button. ■ A nudge only when you'd actually forget Notifications fire only on days you haven't logged yet, and you can log right from the notification. If a streak is alive, a second "before it breaks" reminder follows later in the day. ・Fully localized in English and Japanese ・Dark mode and Dynamic Type support ・Free, with a banner ad No motivation speech required. Just tap today's square.

I made 20% because I wanted a tip calculator that gets out of your way — the keyboard's already up when you open it, and the math is done before you'd have finished unlocking a bigger app. • PRESETS: 15, 20, 22, 25, and 30% built right into the keyboard. Tap one and you're done — it remembers your last pick for next time. • SPLIT: Divide the bill any number of ways and see exactly what each person owes. • ROUND UP: Round the tip or the total to a whole dollar, so nobody's counting out exact change. • WORK BACKWARDS: Know what you want to pay? Type the tip or total and the percentage figures itself out. • 100% FREE: No in-app purchases, no subscriptions, no ads, and I'm not planning to add any. I'm not trying to make money off this — I just wanted the math to be one tap, not five. Comes in dark and light, works fine for a quick trip to another country too. Fully on-device — no account, no tracking, no network calls. If there's something you want it to do, let me know in a review.