Most period trackers store your most personal data on their servers, tied to an account. Quiet Cycles keeps it on your device — and only your device.
No sign-up, no email, no password. Open the app, answer three things, and you're tracking.
Last period start date, your usual cycle length, and whether you're trying to conceive. Skip anything you like.
Period days, flow, symptoms, mood. One screen, under ten seconds — predictions improve with every cycle you log.
Next period, fertile window, and ovulation estimates — all computed on your phone from your own logged cycles. Never sent anywhere.
Other apps ask you to trust their privacy policy. Quiet Cycles is built so there is nothing to trust — the data never leaves your phone in the first place.
Face or fingerprint lock keeps the app private even on a shared or borrowed phone.
Your encrypted backup is a file you hold — not an account on our servers. There are no servers.
A delete-all button wipes everything on demand, instantly, because it's all on your device.
The big apps charge about $10 a month and still keep your data on their servers. Quiet Cycles Premium is $10 a month — and your data never leaves your phone.
| Quiet Cycles | Typical tracker | |
|---|---|---|
| Account required | No | Yes |
| Your data stored on a server | No — device only | Yes |
| Analytics / ad trackers | None | Usually present |
| Biometric app lock | Yes | Varies |
| Backup | Encrypted file you control | Their cloud |
| Premium price | $10/month | About $9.99/month |
The core tracker is free. Premium ($10/month through the App Store or Google Play) unlocks:
The whole app re-centers on fertility: fertile-window countdown, ovulation test and temperature logging, and a gentle test-day reminder.
PMS, mood, and energy correlation cards drawn from your own patterns.
A clean one-page cycle summary you can print or hand to your clinician.
Share fertile-window status through an encrypted share code. They see the window — never your symptom logs or notes. No server involved.
Quiet Cycles is currently in development. Join the list and get exactly one email when it's live on iOS and Android. Nothing else, ever.