CLUSTER PERIOD-TRACKER-CYCLE · 25 ENTRIES · EARLIEST ENTRY 2016-11-17
Privacy-focused period trackers
This cluster consists of period and cycle tracking apps that emphasize on-device data storage, encryption, or no-login use, often incorporating AI or machine learning for cycle predictions, symptom logging, and fertile window tracking. Dated entries appear sporadically from 2016 to 2025, with no clear trend in frequency, and the most recent pre-index entry is in 2025-06. Traction leaders NerdCycle, HeySis, and Bloomra each have zero stars, indicating no standout activity signal.
Entry timeline
ENTRY TIMELINE
Each bar is the month a member carries, which is a creation date where the source published one and a crawl date otherwise. Nothing in the index was found before 11 August 2026, and coverage broadened sharply on 14–15 August, so a bar from then on reports how much we found that month, not how much was built; an earlier bar reports how far back a member's own source dated it — not how long we have been watching.
Members by activity
Activity signals, not revenue.
Build origin · 5 unlabelled
Operator · 2 commercial · 3 unlabelled
Two labels per entry, never collapsed into one: how it was built, and who stands behind it. Counted over the 5 listed below. Unlabelled means nothing has decided yet — not that the answer is small.
- 21Period Tracker: AI Pet0★7 mostalelivePeriod tracker with a virtual pet companion that provides emotional support, mood insights, and cycle predictions while keeping data on-device.
- 22MyFlo® Period Tracker Calendar0★8 mostalelivecommercialCycle syncing period tracker that provides predictions, symptom tracking, and guidance for hormonal health.
- 23period tracker : Ovi AI0★10 mostaleliveCycle and wellness journal that logs periods, symptoms, habits, and meals, then offers cycle-aware wellness tips and insights.
- 24Period Tracker - Cycle Log0★6 mostalelivecommercialFree period tracker with cycle predictions, symptom logging, and privacy-focused local data storage.
- 25Monthly PRIVATE Period Tracker0★2 yrabandonedlivePrivacy-focused period tracker that stores data locally and provides cycle predictions, symptom tracking, and educational information.
Ranked by traction, highest first, and paged 20 at a time — this is a window on the cluster, never the whole of it. Ties are broken by a stable id so a product cannot appear on two pages or fall between them. Browse every cluster.