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/