A calm, private period tracker, built for teens.

TeenCycle started at a kitchen table, not a boardroom. A mom and her daughter went looking for a period app they could trust — and couldn't find one. The apps they tried wanted an email and a login before logging a single day. Some asked questions far too personal to put in front of a young teen. Most had feeds to scroll, streaks to keep, and a quiet habit of sending the most personal information there is to a server somewhere.

So they stopped looking and started listing — not what an app could do, but what it should. It should log a day in one tap. It should never ask a young teen a question that isn't its business. It should keep everything on the phone, where no company — not even us — can see it. And it should cost one fair price, once, with nothing ever trying to sell anything again.

That's the whole app.

STRICTLY OFFLINE
Your data is stored only on your device. No cloud, no sync, no servers, no backups we can read. It works fully in airplane mode. If your phone is off, your data is off — and if you delete the app, it's gone for good.

NO ACCOUNT, EVER
No sign-up. No email. No password. No phone number. You open the app and start tracking. We have no way to identify you, because we never ask.

ONE TAP TO LOG
Open the app, tap the circle, done. No forms, no follow-up questions. Three screens total — Today, Calendar, and Settings.

AGE-APPROPRIATE BY DESIGN
No questions a period tracker has no business asking a young teen. No social feed, no comments, no DMs, no profile, no links out. There is no way for anyone outside to reach someone using the app, because there is no "outside" inside the app.

ONE FAIR PRICE
Free for 7 days. If you want to keep it, it's a one-time $9.99 — no subscription, no renewal, no second charge, ever. No ads. Nothing to upsell.

A WARM DARK MODE
One toggle swaps the whole app to a soft charcoal theme for late nights — the same calm layout, dimmed for bed.

WHAT'S NOT IN THE APP
No accounts. No subscriptions. No ads. No analytics. No social feed. No notifications nudging you back. No astrology, no invasive questions. The list of what's not in TeenCycle is longer than the list of what is — on purpose.

A note on predictions: TeenCycle estimates your next period from the cycles you log, and gets better the more you use it. It isn't a medical tool and doesn't replace a doctor. If something feels off, please talk to a healthcare provider.

We're not a startup with investors to answer to or data to sell. We're a family that built the thing we wished existed — for our own daughter first. If it earns a place with yours, it's because it does its job, and then leaves her alone.

Questions? Email support@teencycle.com — a real person reads every message.