Ebb
Track your cycle privately. No account, no data sold, ever.
FreeOpen Source349 impressionslaunches Oct 27
Ebb is a privacy-first period and wellness tracker that stores encrypted data only on the user’s device.
- for
- Women who want to track their menstrual cycle without accounts or data collection.
- pricing
- free
- license
- AGPL-3.0
Key features
- Client-side AES-256-GCM encryption — All data is encrypted on the device before any network transmission.
- Homomorphic encryption — Enables aggregate statistics for research without decrypting individual records.
- Partner sync via MPC — Share fertility windows with partners using secure multi-party computation, without exposing raw data.
- Serverless storage — Data lives only in the browser’s IndexedDB, eliminating a central database.
- Zero telemetry — No analytics, cookies, or fingerprinting; the app cannot identify users.
- Ephemeral by default — Data auto-deletes after a user-chosen retention period for true digital forgetting.
Use cases
- Track menstrual phases privately on a phone or laptop.
- Share fertility windows with a partner without revealing raw cycle data.
- Contribute anonymized aggregate statistics for research without exposing personal information.
- Maintain compliance with privacy regulations (GDPR, HIPAA) for personal health data.
Ebb vs alternatives
| Ebb |  Plausible |  Umami |  Bruno |  Appwrite | |
|---|---|---|---|---|---|
| Best for | End-to-end encrypted cycle tracking | Privacy-first web analytics | Privacy-focused analytics | Offline-first API client | Self-hosted backend services |
| Pricing | Free | Subscription | Free | Free | Subscription |
| DevHunt upvotes | 1 | 0 | 0 | 0 | 0 |
| Launched | Oct 2026 | — | — | — | — |
- Ebb vs Plausible: Provides privacy-friendly web analytics, not health tracking
- Ebb vs Umami: Simple privacy-focused web analytics, unrelated to menstrual tracking
- Ebb vs Bruno: Offline-first API client, not a health tracker
- Ebb vs Appwrite: Open-source backend platform, not a personal tracker
Ebb FAQ
Do I need to create an account to use Ebb?+
No, Ebb works offline and does not require any account or login.
Where is my cycle data stored?+
All data is stored locally in the browser’s IndexedDB and never uploaded to a server.
Can Ebb sell or share my data?+
No, the app is open source, collects zero telemetry, and cannot access your data to sell or share it.
Is Ebb compliant with privacy regulations?+
Ebb is GDPR compliant, HIPAA aligned, and SOC 2 Type II ready.
How does partner syncing work without exposing my data?+
It uses secure multi-party computation (MPC) so partners see only fertility windows, not raw cycle entries.
Is the source code available?+
Yes, Ebb is open source and its cryptographic implementation can be verified publicly.
Summarized by DevHunt from ebb.lyfmail.com · Oct 4, 2026. Details may change; check the official site.
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