TinyFines is a simple habit tracker your friends can see. Tick off your day, and your friends see every day you keep, and every day you don't. Skip one, and you owe a friend a tiny fine: half a pizza, a coffee, €2, whatever you agreed on.

Friends see your habits, your streaks and every day of them. Fines are set per habit, or not at all, and can be anything: euros, a beer, a lunch, even a third of a pizza. A fine is just a note of who owes whom, and you settle up the way you'd pay a friend back for lunch, so money never goes through the app. A friend (or Grandma) can also sponsor a habit and pay you for every day you keep it.

Today is one row per habit, one tap each. Apple Health and Health Connect tick off steps, workouts and mindful minutes by themselves. Reminders, home screen widgets, a calendar and stats for every habit, rest days that keep your streak, and private habits that stay yours.

It is made for friends who want to read more, train more or scroll less, together; for couples and roommates keeping each other honest; and for anyone who keeps a habit better when someone is watching, and when skipping it costs a coffee.

Open the app and add your habits, no account needed. Sign in with Apple, Google or email when you add your first friend, and your habits come along. TinyFines is free on iPhone, iPad, Mac, Apple Watch, Android and the web.