Fern: Intermittent Fasting

A calmer way to fast

Only for iPhone

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

iPhone

A fasting timer tuned to your circadian rhythm, not just a countdown — with Live Activities, a Home Screen widget, and reminders on both sides of your eating window. Fern is a fasting timer built around one idea: the app should feel like a companion helping you succeed, not a rule enforcer tracking whether you comply. FREE, NO ACCOUNT REQUIRED • Every fasting protocol — 16:8, 18:6, 20:4, OMAD, 5:2, and more — free, no paywall • A calm, stage-aware timer with a Live Activity and Dynamic Island support • Streaks that forgive a missed day instead of resetting to zero • Milestone badges from 12 hours to 48 hours • Full history with edit/delete, and a real daily-hours chart • Reminders for both sides of the window — when your fast is ending, and when your eating window is about to close • A Home Screen widget showing your streak and live countdown FERN+ • Circadian Smart Schedule — automatically lines up your next fast around your actual sleep pattern, and lets you fine-tune it on an interactive 24-hour dial • Fasting Insights — real correlations between your fasting consistency and your sleep, not just a trend line • A widget gallery, including a 14-day adherence widget and one-tap start/end from your Home Screen • Personalized nudge timing, tuned to when you actually tend to break a fast • Deeper analytics against your weight and sleep trends (with Apple Health connected) • Fully custom protocol configuration Fern never asks for an account. Your fasting history stays on your device — there's no backend, no analytics, no tracking. Fern+ is an auto-renewing subscription. Payment is charged to your Apple ID at confirmation of purchase. Subscriptions renew automatically unless auto-renew is turned off at least 24 hours before the end of the current period. Manage or cancel anytime in your Apple ID account settings. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://lubiqet.github.io/fern-site/privacy.html

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The developer, Lubo Kvt, 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

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    Accessibility

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    Information

    Seller
    • Lubo Kvt
    Size
    • 1.9 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.
    Languages
    • English
    Age Rating
    9+
    Copyright
    • © Lubiqet
  • Developer Website
  • Privacy Policy