Ebb

What it does

Ebb is a privacy-first period and wellness tracker. No account required, no data sold to advertisers, no cloud storage. Your cycle data stays on your device. Built for women who want control over their health data. Free and open-source.

Track your menstrual cycle with military-grade privacy. Homomorphic encryption, client-side AES-256, zero-knowledge predictions. No cloud. No accounts.

The only period tracker that uses homomorphic encryption —your data is encrypted before it leaves your device, and stays encrypted everywhere. We can't read it. No one can. Not even us. "After Roe v. Wade was overturned, period tracking data became a legal liability. Ebb was built so your most intimate data can never be subpoenaed, sold, or leaked." Every architectural decision prioritizes your bodily autonomy. Built with the same cryptography used by Signal and Proton. Your data is encrypted on your device using AES-256-GCM before any network transmission. The encryption keys never leave your device—not even for backups. Compute on encrypted data. We can generate aggregate statistics for…from ebb.lyfmail.com

• IM
  I made a privacy friendly and simple app to track my menstruation2024 · play.google.com · ▲732

  Hey HN, after the app I actually used to track my period wanted me to log in and save my data in the cloud, I decided to write my own. Most apps in this area are based on a subscription model and display far too much information anyway. For me, a simple calendar is enough where I can add a few notes if necessary. So that is the result of my work - a simple design and the data is only saved on the smartphone.

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