Cycle Sister

Period & Fertility Tracker

Free · In‑App Purchases · Designed for iPad. Not verified for macOS.

Track your period, ovulation, and fertile windows with complete privacy. Cycle Sister 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

Ratings & Reviews

  • This app hasn’t received enough ratings or reviews to display an overview.

v1.0.7 — Smarter predictions & faster launch • Fixed: predictions now update immediately when you record a new period start or change settings • Fixed: ovulation and fertile window no longer overlap with period days • Improved: calendar markers load asynchronously for smoother scrolling • Improved: app launches significantly faster — ad and billing SDKs now load in the background • Fixed: calendar icons and colors now display correctly after marking a date

Version 1.1

The developer, CloudSpirit Limited, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .

  • Data Used to Track You

    The following data may be used to track you across apps and websites owned by other companies:

    • Usage Data

  • Data Not Linked to You

    The following data may be collected but it is not linked to your identity:

    • Usage Data

Privacy practices may vary, for example, based on the features you use or your age. Learn More

Accessibility

The developer has not yet indicated which accessibility features this app supports. Learn More

Information

Seller
  • CloudSpirit Limited
Size
  • 31.5 MB
Category
  • Health & Fitness
Compatibility
Requires iOS 13.0 or later.
  • iPhone
    Requires iOS 13.0 or later.
  • iPad
    Requires iPadOS 13.0 or later.
  • iPod touch
    Requires iOS 13.0 or later.
  • Mac
    Requires macOS 11.0 or later and a Mac with Apple M1 chip or later.
  • Apple Vision
    Requires visionOS 1.0 or later.
Languages
  • English
Age Rating
16+
  • 16+
  • Learn More
  • Contains
    Advertising
    Health or Wellness Topics
In-App Purchases
Yes
Copyright
  • © CloudSpirit 2026
  • Developer Website
  • Privacy Policy

    • More by CloudSpirit Limited

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