Short answer
Log your cycle privately: because there's no account and nothing is uploaded, your reproductive-health data simply never leaves the phone. That's a meaningfully different privacy posture from trackers that sync to a server.
It's pay-once, so there's no subscription pushing you toward a cloud account either.
What to look for before choosing
- All data on-device — no account, no sync.
- Log flow, mood, symptoms, temperature, intimacy.
- Nothing uploaded or shared.
- Clear cycle predictions from your own data.
- Pay-once (no subscription steering you to cloud).
A practical decision process
- Log your period and daily symptoms.
- Add temperature and mood if you track them.
- Review predictions built from your data.
- Keep everything local — no sign-up.
- Export deliberately only if you choose to.
Quick comparison
| Need | What to check | Why it matters |
|---|---|---|
| Pricing model | Check whether useful features require a subscription, a one-time unlock, or neither. | The cheapest app on day one may not be cheapest after a year. |
| Privacy model | Prefer on-device work when the content is sensitive. | Private documents, resumes, study data, and family content deserve careful handling. |
| Export / lock-in | Confirm file formats, sharing, backup, and deletion controls. | A good app should help you finish the task, not trap your work. |
Where Cyca fits
Cyca fits anyone who wants genuinely private, on-device cycle tracking with no account.
PrivateNo adsOn-device
This page is an independent buying guide. App Store features and prices can change, so confirm details on the listing before purchase.