A period tracker · offline by design iOS & Android

Your cycle. Your data. Strictly offline.

A private, offline period tracker built for teens.

A calm, beautifully minimal period tracker for teenagers. No accounts. No cloud. No tracking pixels. The data lives on your phone — even we can't see it. Download it free for 7 days, then keep it for $9.99 once — no subscription, no ads, no account.

Download on the App Store Get it on Google Play
7-day free trial, then $9.99 one-time. No ads, no account.
Stored on this device
Nothing sent. No account.
No push, no pings
You're the only audience.
TeenCycle Today screen showing the current cycle with a normal flow logged
Our story

I couldn't find the right app for my daughter. So we made one.

It started at our kitchen table, not a boardroom. My daughter, Mia, was about to start tracking her period, and the two of us went looking for an app we could trust. Instead we found apps that wanted her email and a login before she'd logged a single day. Apps that asked a young teen questions about her sex life. Apps with feeds to scroll and streaks to keep, quietly sending her most personal information to a server somewhere. For a period tracker.

So we 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 her phone, where no company, not even us, can see it — the whole case for privacy-first period apps. And it should cost one fair price, once, with nothing ever trying to sell her anything again.

Mia and I designed that app screen by screen — the warm colors, the two flow states, the single tap to log. My husband is the developer; he built exactly what we asked for, and nothing we didn't. Every feature had to earn its place. The rest never belonged here in the first place.

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

Mia's mom sketching the TeenCycle app wireframes by hand at a warm home desk, the designs on screen beside her
— Built on a single principle

No accounts. No subscriptions. Just one payment.

No sign-up No analytics No advertising No subscriptions No social feed No notifications
— Quietly built, for the kind of teenager who'd rather not be tracked.
Three things, done well

What's in. What's not.

A tracker should track. Nothing else. Only the features needed to log a period and predict the next one made it in. Every feature had to earn its place.

100% offline-first.

Your data is stored locally on your device. No cloud sync, no servers, no backups we can read. If your phone is off, your data is off.

Works in airplane mode

Zero bloat.

No social feeds. No habit streaks. No notifications nudging you back. Open it when you need it, close it when you don't.

One tap to log. Three screens, total.

Privacy by design.

No account to make, no email to give, no ID to verify. The app doesn't ask for what it doesn't need — which is essentially everything.

Delete it all in one tap
One tap to log

Logging a day takes a single tap.

Open the app, tap the circle, that's it. No forms, no follow-up questions. Your cycle, logged in a tap. Then get on with your day.

Loved by teens. Trusted by parents.

What early testers are saying.

TeenCycle helps teens track their cycles privately without accounts, ads, distractions, or subscriptions.

“

I love how simple and private it is. No sign ups, no stress, just a clean app that helps me understand my body.

Maya, 16 Beta tester
“

Finally an app made for teens. I feel safe using TeenCycle because I know my data stays on my phone.

Lily, 15 Beta tester
“

As a mom, I love that this app respects my daughter's privacy while giving her the tools she needs.

Amanda, Mom Beta tester · Parent
“

No ads, no tracking, no accounts. Just a beautiful app that does exactly what it should.

Grace, 17 Beta tester
A look at the app

Small. On purpose.

Three screens. That's the whole app. Tap any one below to preview what you'd actually use day to day.

Today screen Calendar screen with logged period days Settings and privacy screen
Easy on the eyes

A warm dark mode for late nights.

One tap in Settings swaps the whole app to a soft charcoal theme — the same calm layout, dimmed for bed.

Today screen in dark mode showing a normal flow logged
Today, dimmed
The cycle dial glows softly against deep charcoal.
Calendar screen in dark mode with logged period days
Calendar at night
Logged and predicted days stay legible in low light.
Settings screen in dark mode with dark mode toggled on
One toggle
Flip dark mode on in Settings. Everything else stays put.
— Frequently asked

Answering the usual questions.

If something isn't here, email support@teencycle.com — a real person reads it.

Does TeenCycle require an account?

No. There's no sign-up, no email, no password. You download the app, open it, and start tracking. We don't have any way to identify you, because we never ask.

Does it work offline?

Yes — entirely. TeenCycle is built offline-first. Airplane mode, no service, Wi-Fi off forever — none of it matters. The app doesn't need a connection to do anything it does.

Is my data stored in the cloud?

No. Your data lives only on your phone. No servers, no cloud sync, no backups we can read. Even we can't see what you log — there's nothing on our end to see.

What if I change my phone? How can I access my info?

TeenCycle has a manual export in Settings. Save your data to a file (AirDrop it, email it to yourself, or stash it in Files), then import it into TeenCycle on the new phone. Because we never keep a copy in the cloud, this last step is yours to do — which is the trade-off for the privacy we promise.

Is it safe for teens?

Yes — they're who we designed it for. No social feeds, no comments, no DMs, no profile, no friend list, no ads, no links out to other content. There is nothing in the app a stranger could use to reach a teen, because there is no "outside" inside the app.

Can parents access data?

Whoever has the phone can open the app and see what's in it — the same as a note or calendar entry. TeenCycle itself doesn't offer a parent dashboard, a parent login, or any way to view someone else's data from a different device. There is no remote view because there is no remote anything.

Is there a free trial?

Yes. TeenCycle is free for 7 days. If you'd like to keep using it, it's a one-time $9.99 — no subscription, no renewal, no second charge ever.

What ages is TeenCycle for?

We built it with teenagers in mind, but anyone is welcome to use it. The same things that make it good for a 14-year-old — three screens, two flow states, one tap to log, nothing trying to sell you anything — work just as well for an adult who'd rather not have a tracker with a social feed.

How accurate are the predictions?

They get better as you log more cycles. Like any tracker, TeenCycle estimates your next period from your past data — it isn't a medical tool and shouldn't replace a doctor. If something feels off, please talk to a healthcare provider.

What happens to my data if I delete the app?

It's gone. Everything is stored locally, so removing the app removes your cycle history with it. If you'd like to keep a copy, export it from Settings before you delete.

Can I get a refund?

Refunds are handled by Apple's App Store or Google Play through their standard process — they own the transaction, not us. If something is wrong with the app itself, email support@teencycle.com first. We'd rather fix the problem than have you go around the houses for it.

How do I contact you?

Email support@teencycle.com. A real person reads it, and replies usually land within a day or two. We're a small team and we read everything.

— On iOS & Android · No ads · No account

Your cycle. Your data. Strictly offline.

Log, predict, and get on with your day.

Download on the App Store Get it on Google Play
7-day free trial, then $9.99 one-time. No ads, no account.