Cycle-tracking apps are some of the most privacy-sensitive apps on your phone — yet many upload your data and monetize it. For something this personal, on-device is the only sane default.
What to look for
- Data stored on-device, not in someone's cloud.
- No account / no sign-up required.
- A clear view of phases, fertile window, and gentle days.
- A one-time price, not a subscription on your own health data.
I built Cyca to do exactly that: private period & cycle tracking that stays on your iPhone — pay once, no account, nothing uploaded.
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