The honest answers.
Short version of everything below: it’s a period tracker, your data stays on your phone, and you pay once.
No. There’s no sign-up, no email, no password — nothing to create and nothing for us to lose. The app works the moment you open it.
On your phone, and nowhere else. There’s no Peridot account, no server, and no database — your cycle data never reaches us. You can export your own copy as a CSV any time.
$9.99, once. One payment and it’s yours, with no subscription, ever. You’re buying the calendar, not renting it.
Both, any time. Export your full history as a CSV from Settings, and erase everything from the same place — it wipes the app’s database on your device for good. There’s nothing for us to delete, because we never had a copy.
It never forgets a cycle you’ve logged — it just listens to recent ones more closely, so if your body changes the predictions follow, and one odd month can’t drag everything with it. You get a single most-likely day plus an honest window that tightens as it learns you.
No, and we won’t pretend otherwise. Peridot predicts when your next period is likely to start and shows cycle phases as estimates. It isn’t a contraceptive or a conception tool, and it isn’t built for trying to conceive — that needs precision we don’t claim.
Off until you turn them on. Only two exist, both predictive — “starting soon” and “starting today” — and each toggles on its own. No streaks, no “we miss you,” no marketing, ever.
Because there’s no subscription to trial into, and no ads to make a free tier pay for itself. You see your real calendar before you decide, and then you pay once.