QadaOS

Missed prayers add up. QadaOS keeps one honest ledger of what you owe, what you make up, and what you miss today, with a catch-up plan you can change whenever you like.

Works offline
No ads, no sharing
No streaks, no guilt
Free and open source

Setup takes about two minutes: where you pray, how many you owe, and a plan. Signing in again on a new device restores everything.

Your account is your Google account. Your prayer data is used only to run your ledger, and you can export or delete it at any time. Privacy · Source