Lumen Cycle

Support

100% offline period tracker for iPhone

Need help?

Email us and we’ll get back as soon as we can.

Common topics

Privacy: Your logs stay on this device. See the Privacy Policy.
Face ID: Required when opening the app and returning from the background.
Free tier: First calendar month of logging is free.
Premium ($2.99): One-time unlock for ongoing logging, full charts, and export. Restore Purchase is in Settings.
Predictions: Estimates only — not for birth control and not medical advice.

After you publish this site with GitHub Pages, use: