Ebb: Period & Cycle Tracker

Ebb learns the length of your cycles and shows the next period as a window. The width of that window is the honest part: it covers the days Ebb is actually unsure about, and it narrows as your history grows.

Your cycle data stays on your phone. You don't create an account, and Ebb sends nothing about your cycle anywhere. Periods, symptoms, moods, sleep and notes are stored on the device and never uploaded.

WHAT EBB DOES
- A cycle wheel on Today with the current phase, the estimated fertile window and the prediction window
- A five-second log for flow, symptoms, moods, sleep and a note
- Insights from your own data: average cycle and period length, and your last three cycles
- Reminders before your period, on the expected day, and for logging
- CSV export and import, always on an explicit tap
- App lock with a PIN or fingerprint, and a discreet mode with a neutral home screen icon and neutral reminder texts

EBB PRO
Everything above stays free, with no ads. Pro is a one-time purchase and adds:
- Predictions three cycles ahead
- Symptom patterns by phase
- Full history and the regularity trend
- PDF report and calendar export
- Extended reminders and custom symptoms

A NOTE ON ESTIMATES
Every date in Ebb is an estimate based on your own past cycles. Ebb is a tracker for your own records and is not meant for medical diagnosis or for avoiding pregnancy.

Questions and feedback: [email protected]