Rewhen: When Did I Last

When did I last change the water filter? Call my parents? Take the dog for shots? Some things don't belong in a calendar. You don't know when you'll do them again — you just want to know how long it's been, and whether it's time. Rewhen answers exactly that. You don't plan anything. You tap once when something is done, and the app does the counting. HOW IT WORKS Add what you want to keep an eye on — water filter, haircut, dentist, oil change, bed sheets. Did it? One tap. The card now says "43 days ago" and starts counting toward the next time. Set how often it should happen and the card fills up as the days pass: green, then orange, then red when you're overdue. Don't set anything and Rewhen works it out from your own history — "usually every 27 days, next around Oct 5". The list sorts itself by urgency, so whatever is overdue is always on top. WHAT'S INSIDE • One-tap logging, with undo if you tapped by mistake • Backdating — remembered something a week later? Add it with the right date • Full history you can edit, with notes and photos on any entry • A six-month heatmap that shows your real rhythm at a glance • Stats: average and median cycle, shortest and longest gap • Reminders a day before, or whenever you choose — per tracker if you like • Your own categories, search, and four ways to sort • Face ID lock, because some histories are private • Export to CSV and JSON, import back — your data stays yours • Siri and Shortcuts: "Log it" without opening the app • Eleven app icons to pick from • Dark and light themes, English and Russian NOT A HABIT TRACKER No streaks. No badges. No scolding. Skipping is normal here — that's the whole point. Rewhen doesn't judge how you live, it just remembers when things happened. PRIVATE BY DEFAULT Everything stays on your iPhone. No account, no sign-up, no cloud, no analytics, no ads, no tracking. The app never connects to the internet — it doesn't need to. Free, with no subscription and nothing locked behind a paywall.