Re:I built a Chrome extension that syncs your life with your...
by Ogbon on Wednesday March 11, 2026 @07:07AM
(#47334071)
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.
Re:I built a Chrome extension that syncs your life with your...
by aethorn on Friday March 13, 2026 @08:20AM
(#47363455)
Really cool that all data stays local in the browser — that's exactly how privacy-sensitive tools should work. As someone building a Chrome extension myself, I appreciate the no-account-needed approach. For UX feedback: have you considered adding a simple onboarding screen on first install? Even a single page explaining what it does and how to start would help with retention. Nice work shipping this!
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/