Fern: Period and Cycle Tracker

Private. Secure. Beautiful.

Only for iPhone

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

iPhone

Your cycle, your pregnancy, your data. Smart predictions, gentle reminders, widgets & Apple Health sync — private by design. No account. No tracking. Ever. Fern is the period and pregnancy tracker that puts your privacy first. No account required. No cloud sync by default. No tracking or analytics. Your intimate health data stays on your device, exactly where it belongs. PERIOD TRACKING MADE SIMPLE • One-tap period logging - start and end your period with a single button • Smart predictions based on YOUR cycle history, not opaque algorithms • Beautiful calendar showing past periods, predictions, and fertile window • Log symptoms, moods, and notes for complete cycle awareness • Detailed statistics showing your average cycle and period length PREGNANCY MODE When you're ready, switch to pregnancy tracking with a single tap: • Week-by-week baby development with size comparisons and milestones • Track weight, blood pressure, and pregnancy symptoms • Kick counter with timer and haptic feedback • Prenatal appointment scheduling with reminders • Bump photo diary to capture your journey • 42 weeks of detailed guidance from conception to birth PRIVACY FEATURES THAT PROTECT YOU • Face ID & Touch ID protection • Passcode lock for extra security • DECOY MODE: Enter a different passcode to open the app with mock data - perfect for when someone demands to see your phone • All data stored locally - your information never leaves your device • Optional encrypted iCloud backup - only if YOU choose • No account, no registration, no tracking BEAUTIFUL DESIGN • Soft, feminine aesthetic with thoughtful animations • 6 gorgeous themes: Rose (free), Lavender, Sage, Ocean, Sunset, Midnight • Clean interface designed for daily use • Dark mode support with Midnight theme FREE FEATURES • Complete period tracking and predictions • Cycle calendar with fertile window • All privacy and security features • Basic symptom and mood logging (5 per day) • Full pregnancy tracking mode PREMIUM FEATURES • Unlimited daily symptoms • 5 additional beautiful themes • PDF reports to share with your doctor • Advanced cycle statistics • Priority support TRANSPARENT PREDICTIONS Unlike apps that use mysterious algorithms, Fern's predictions are simple and transparent: • We average your last 6 cycles • Fertile window calculated from expected ovulation (14 days before next period) • You can see exactly how predictions are made YOUR DATA STAYS YOURS We built Fern because we believe intimate health data deserves the highest protection. We don't: • Require an account • Collect analytics • Share data with third parties • Store your data on our servers • Track your behavior Fern is the cycle tracker for people who value their privacy. Download now and take control of your health data. --- Privacy Policy: https://geba89.github.io/fern-website/privacy.html Terms of Use: https://geba89.github.io/fern-website/terms.html

Ratings & Reviews

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Fern 1.1 is our biggest update yet NEW • Widgets! Cycle day, quick log, and pregnancy countdown for your home and lock screen • Bump Photo Diary (Premium) — capture your journey week by week • Period & fertile window reminders — a gentle heads-up, computed privately on your device • Cycle phase insights — know when you're in your follicular, fertile, or luteal phase • Apple Health sync (optional) — Fern can write your period days to Health, and never reads anything • Log past periods in one tap — "my period started 2 days ago" • Record your baby's arrival — birth date and weight complete your pregnancy story • Edit and complete appointments, with smarter reminders IMPROVED • Pregnancy weeks now match the convention your doctor uses • Smarter predictions that ignore logging gaps • Overdue? Fern now shows "days late" instead of going quiet • Beautiful new charts in Insights • Midnight theme polish on every screen • Stronger protection: Keychain-secured passcode, automatic re-lock, and a privacy shield in the app switcher • Backups now include pregnancy data with stronger encryption • Full VoiceOver support Your body, your data. Always.

Version 1.1

The developer, Piotr Gebski, 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 Not Collected

    The developer does not collect any data from this app.

    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
    • Piotr Gebski
    Size
    • 2.4 MB
    Category
    • Health & Fitness
    Compatibility
    Requires iOS 17.0 or later.
    • iPhone
      Requires iOS 17.0 or later.
    • Mac
      Requires macOS 14.0 or later and a Mac with Apple M1 chip or later.
    • Apple Vision
      Requires visionOS 1.0 or later.
    Languages
    • English
    Age Rating
    13+
    • 13+
    • Learn More
    • Infrequent
      Medical Treatment information

      Contains
      Health or Wellness Topics
    In-App Purchases
    Yes
    Copyright
    • © 2026 Piotr Gebski. All rights reserved.
  • Developer Website
  • Privacy Policy

    • More by Piotr Gebski

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