Support
Last updated: 29 September 2026
No account is required
There is no sign-up, login, or profile. Open the app and start logging. Nothing is sent to a server.
How to log a day
Open Today and use the button at the bottom. You can add flow, symptoms, mood, and a note. Everything you save stays on that iPhone.
Estimates come from the cycles you log
The next-period and fertile-window dates are worked out from your own history, so they can be wrong. They are not medical advice, not contraception, and not a diagnosis.
Reminders are optional
Turn them on in Settings and pick a time. The lock screen stays generic and says only “You have a Cycle reminder.”
Erase everything
Settings can erase logs, preferences, the PIN, reminders, and the widget snapshot. Deleting the app removes what remains.
Export your data
Export from Settings as CSV, JSON, or PDF, then share the file yourself from the iPhone share sheet. Cyle does not upload it anywhere.
About the app
Cyle is free, iPhone only, needs iOS 18 or later, and is rated 16+. There are no ads, purchases, or subscriptions.