I built CycleSync after noticing there's no lightweight, privacy-first cycle tracker that lives in your browser without requiring an app download or account signup.
It tracks your cycle phase, predicts your next period and ovulation, lets you log symptoms daily, and gives you phase-specific tips (e.g. peak energy during ovulation = good time for big meetings).
No account needed. All data stays local in your browser.
Would love feedback from the HN community — especially on the UX and what features would make this actually useful day-to-day.
Ogbon•1h ago
It tracks your cycle phase, predicts your next period and ovulation, lets you log symptoms daily, and gives you phase-specific tips (e.g. peak energy during ovulation = good time for big meetings). No account needed. All data stays local in your browser.
Would love feedback from the HN community — especially on the UX and what features would make this actually useful day-to-day.
Chrome Web Store: https://chromewebstore.google.com/detail/cyclesync/egmjjdfhn...
Landing page: https://wushu75.github.io/CycleSync/