Chainkeep

Chainkeep is a habit tracker for iPhone and Android built on two ideas: checking off a habit should take one tap, and your streak should be right.

Most habit apps break a "three times a week" habit on the first day you rest. Chainkeep counts each habit by its own schedule: daily, specific days, every few days, or a number of times per week or month. Weekly and monthly goals keep their own streaks, and skipping a day or pausing a habit holds the streak instead of breaking it.

Every chart and stat is free. There's no account, no ads and no analytics: habits are stored on your device, with optional iCloud sync on iPhone. Free keeps up to six habits; Pro is a one-time purchase, not a subscription.