Period & Symptom Log
Log period days, flow level, symptoms, mood and personal notes. The daily check-in is built to take a few seconds.
Features
Focused Tools for Cycle Awareness
Each feature is designed to work without sending your health data to anyone.
Cycle Phases & Predictions
See your phase (menstrual, follicular, fertile, luteal), the estimated fertile window and the next expected period. Predictions use the calendar method on your own history.
Statistics
Average cycle and period length, regularity, and symptom frequency, all calculated locally in your browser.
Partner Sync
Opt-in, peer-to-peer sharing over WebRTC. Share fertile-window timing without handing over your full log. Revoke at any time.
Export
Create a PDF summary for appointments, a CSV for your own spreadsheets, or a QR code to move data between devices.
Settings & Privacy Controls
Pick a retention period, manage your identity keys and backup, or wipe local data.
Offline & Installable
Install Ebb on your home screen or desktop. It opens full-screen and keeps working with no connection.
No Ads, No Analytics
Not a feature toggle: Ebb simply contains no advertising or analytics code.
