Cycle Sister

Contains adsIn-app purchases
Content rating
Everyone
5+
Downloads
Content rating
Everyone
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About this app

Cycle Care is a private, local-first period and fertility tracker. Log your period cycles, track predictions for next cycle, fertile window, ovulation day, and safe windows. All data is kept 100% secure and stored locally on your device.

Key features include:
• Period start and length logging
• Predictions for next periods and ovulation days
• Color-differentiated safe/ovulation/predicted periods
• Multi-profile support for recording multiple people (Pro features)
• Local backup and restore with strong password encryption

Privacy Policy: https://sites.google.com/view/cycle-care-app/privacy
Terms of Use: https://sites.google.com/view/cycle-care-app/terms
Track your period, ovulation, and fertile windows with complete privacy.
Updated on
Sep 11, 2026

Data safety

Safety starts with understanding how developers collect and share your data. Data privacy and security practices may vary based on your use, region, and age. The developer provided this information and may update it over time.
  • No data shared with third parties
    Learn more about how developers declare sharing
  • No data collected
    Learn more about how developers declare collection