I built a small open-source project called YourCycleKeeper, a privacy-first period tracker that runs entirely client-side.
The motivation was simple: I noticed that many period tracking apps request extensive permissions and integrate multiple third-party trackers.
I wanted an alternative where:
- no accounts are required
- no data leaves the device
- no analytics or tracking scripts are included
- everything runs locally in the browser
So this app works entirely client-side and stores data locally.
The project is still in beta but usable, and I’m planning an Android APK version soon.
Demo: https://yourcyclekeeper.web.app/period-tracker/
Intro: https://yourcyclekeeper.web.app/
Source: https://github.com/pythonime-lab/yourcyclekeeper
I’d really appreciate feedback from the HN community, especially around the architecture and privacy model.