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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

NOV 2016: 1JAN 2020: 1FEB 2022: 1NOV 2023: 1MAY 2025: 1DEC 2025: 5MAR 2026: 1APR 2026: 1MAY 2026: 4JUN 2026: 3JUL 2026: 2AUG 2026: 1SEP 2026: 3
NOV 2016SEP 2026

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 · 1 hand-coded · 19 unlabelled

Operator · 2 hobby · 2 indie · 4 commercial · 12 unlabelled

Two labels per entry, never collapsed into one: how it was built, and who stands behind it. Counted over the 20 listed below. Unlabelled means nothing has decided yet — not that the answer is small.

  1. 01Bloomery1★11 days—Self-hosted period and cycle tracker that predicts cycles, offers daily insights and an AI assistant, and integrates with Home Assistant.
  2. 02Her Signal: Period Tracker0★28 dayslivePeriod tracker designed for couples that shares cycle phases with partners and provides insights for better relationship awareness.
  3. 03OpenCilco-web0★21 dayslivehobbyPrivacy-focused cycle tracking web app that predicts next period start and cycle length while keeping health data under user control.
  4. 04ebbwell0★14 dayslivehobbySelf-hosted period tracker and ovulation estimator that applies symptothermal rules to predict fertile days and menstruation while keeping data private.
  5. 05HeySis: Cycle & Period Tracker0★10 dayslivePeriod and cycle tracker that offers conversational check-ins and predictions, explaining body changes in plain language.
  6. 06Bloomra: Period Tracker0★11 dayslivecommercialPeriod tracker that stores data on-device with end-to-end encryption and provides cycle predictions based on logged symptoms.
  7. 07eluna: AI Period Cycle Tracker0★1 moliveindiePeriod tracker that uses logged data to give personalized daily insights, mood and symptom tracking, cycle predictions, and partner sharing.
  8. 08GetMyMood: Period Tracker0★14 dayslivePeriod tracker that logs mood, energy, and symptoms, maps patterns over time, and explains cycle phases and their effects.
  9. 09HerFlow - Period Tracker0★22 dayslivePeriod tracker that lets users log cycles, share phase updates with partners and family, and receive supportive tips and cycle education.
  10. 10Period Tracker: Secure Privacy0★1 molivePeriod and cycle tracker with phase insights, partner sync, and home-screen widgets for symptom logging.
  11. 11RedTent1★1 moliveMobile-first health platform for women's cycle tracking, wellness logging, journaling, and AI-assisted food analysis.
  12. 12Period Tracker - Menstrual Log0★3 molivehand-codedcommercialLogs menstrual periods, symptoms, and moods with cycle predictions and adaptive reminders across multiple languages.
  13. 13Period Tracker: P Forest0★2 moliveindiePeriod tracker that grows a pixel-art forest with the user's cycle, logs symptoms, and keeps data on-device with passcode lock.
  14. 14Mira - Cycle & Period Tracker0★3 moliveCycle tracker that adapts predictions to irregular cycles and PCOS, logs symptoms and moods, and answers cycle questions with an on-device assistant.
  15. 15Rosie - Period Tracker0★8 mostalelivePrivacy-focused period tracker that keeps data on-device, offers AI predictions, symptom logging, and fertile window tracking.
  16. 16Hush: Period Tracker0★1 molivecommercialPeriod tracker that logs symptoms, provides cycle insights, and exports health data to CSV with iCloud sync.
  17. 17Ovi - Period Tracker0★5 molivePeriod tracker that uses daily face scans and symptom logging to predict cycle phases, mood shifts, and energy levels.
  18. 18Lumi: Period Tracker0★3 molivePeriod tracker app with AI companion for cycle tracking and family sharing.
  19. 19Dona Period Tracker0★5 molivePrivacy-focused period tracker that logs cycles and shows how phases relate to mood and well-being, without registration or ads.
  20. 20My period calendar Pinkllama0★6 mostalelivecommercialPeriod tracker with predictive cycles, symptom logging, and personalized cycle insights.

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.