FastZen: Fasting Timer

Timer and custom week

Free · In-App Purchases

See elapsed time and the planned finish, then plan the week, including rest days. History stays on your device. Custom Week is a one-time purchase, not a subscription. See how long an intermittent fast has already run, and the hour it is planned to end. Choose 16:8, 18:6, 20:4, OMAD (23 hours) or any length from 1 to 48 hours, then start. An active session resumes when you reopen the app. The free routine repeats one start time on the days you select. Reminders stay on the device. History, the streak and correcting a finished session are included. The next seven days are visible before any purchase. Custom Week, a one-time purchase with no subscription, gives each day its own protocol and start time. You can mark a rest day, move the start for a single date, or start at the planned hour if you open the app up to four hours late. People who used FastZen before version 1.1.0 keep that access without paying. On iPhone, the Lock Screen can show the session. iOS limits each Live Activity to eight hours; the session stays saved in the app. No account, no ads and no server sync. This is a tracking tool, not medical advice or a weight-loss promise.

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Settings show whether reminders are off or blocked and provide the appropriate action. Empty history explains that completed sessions appear there. On iPhone, the purchase offer comes before the example week. Texts distinguish the routine, Custom Week and a change for one date only. Your sessions and existing access are preserved.

The developer, Benjamin Dupin, 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

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

    Seller
    Benjamin Dupin
    Size
    2.3 MB
    Category
    Health & Fitness
    Compatibility
    Requires iOS 17.0 or later.
    • iPhone
      Requires iOS 17.0 or later.
    • iPad
      Requires iPadOS 17.0 or later.
    Languages
    English and 6 more
    • English, French, German, Italian, Japanese, Portuguese, Spanish
    Age Rating
    9+
    In-App Purchases
    Yes
    Copyright
    © 2026 Benjamin Dupin