Locklune

Private Period & Cycle Tracker

Free · Designed for iPad. Not verified for macOS.

Your cycle. Locked to your device. 100% offline, no account required. AES-256 encrypted. No data ever leaves your phone. Locklune tracks your period and cycle entirely on your device - encrypted, offline, always private. There is no account to create. No server ever receives your data. No analytics, no ads, no tracking. Everything you log is protected by AES-256 encryption tied to your PIN and never leaves your phone. WHY LOCKLUNE? Most period apps upload your most intimate health data to the cloud. Locklune doesn't. It can't - the app has no network access at all. Your cycle history, symptoms, moods, and predictions are encrypted the moment you enter your PIN. FEATURES • Period & cycle tracking — log when your period starts and ends, with flow intensity for each day • Smart predictions — Locklune learns your personal cycle length and improves its estimates as you log more cycles • Fertile window & ovulation — see your estimated fertile days and ovulation date at a glance • Cycle phases — know which phase you're in today: menstrual, follicular, ovulatory, or luteal • Symptom & mood logging — record how you feel each day and spot patterns over time • Calendar view — see past periods, predictions, fertile days, and logged entries in one place • Insights — average cycle length, period length, variation, a cycle chart, and upcoming period dates months ahead • Tomorrow preview — see what to expect the next day based on your own history • Optional reminders — local, on-device notifications for your period and fertile window (no internet needed) FIVE MODES Cycle tracking — full period and fertility view Period tracking only — periods logged; fertility content hidden Trying to conceive — fertile window and ovulation front and centre Contraception — tracks bleeds; fertility details hidden for hormonal method users Pregnant — switches to a pregnancy progress view showing week, trimester, and days to your due date PRIVACY BY DESIGN Locklune's privacy is structural. The app contains no networking code. There is no "sync" to disable. No third-party SDKs that phone home. The database is encrypted with SQLCipher using a key derived solely from your PIN. Without your PIN, the data is unreadable, even to us. There is no account recovery - by design. No background network activity. Works indefinitely without an internet connection. --- Locklune is built for anyone who wants to understand their body without trading their privacy to do it.

Ratings & Reviews

  • This app has not received enough ratings or reviews to display an overview.

The developer, Josie Daw, 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 based, for example, 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

    Provider
    • Josie Daw
    Size
    • 59.8 MB
    Category
    • Health & Fitness
    Compatibility
    Requires iOS 16.4 or later.
    • iPhone
      Requires iOS 16.4 or later.
    • iPad
      Requires iPadOS 16.4 or later.
    • Mac
      Requires macOS 12.0 or later and a Mac with Apple M1 chip or later.
    • Apple Vision
      Requires visionOS 1.0 or later.
    Languages
    • English
    Age Rating
    9+
    Copyright
    • © Locklune
  • Developer Website
  • Privacy Policy

    • More by Josie Daw