FastWindow: Fasting Timer

16:8, OMAD schedule & BMR

Only for iPhone

Free · Designed for iPhone. Not verified for macOS.

iPhone

Plan fasting windows, time your fast, and check your BMR. Private and fully offline: no account, no ads, no tracking. FastWindow keeps your intermittent fasting schedule clear and simple: calculate your fasting and eating windows, run a live fast timer, and look up your BMR and daily energy estimates — all on your iPhone, fully offline. FASTING CALCULATOR • Pick a method: 16:8, 18:6, 14:10, 20:4, OMAD, or custom hours • Enter when you last ate and instantly see your fasting window and next eating window FAST TIMER • Start a fast and follow progress on a live ring • Optional notification when your fasting window ends • End or cancel a fast at any time HISTORY • Past fasts stay privately on your device • Streak, average duration, and longest fast at a glance BMR & TDEE • Estimate your basal metabolic rate (Mifflin-St Jeor equation) • Daily energy estimates across activity levels, in metric or imperial units PRIVATE BY DESIGN • No account, no ads, no analytics, no tracking • Works completely offline — your data never leaves your iPhone FastWindow is an awareness and planning tool only. It is not a medical device and does not provide medical advice. Consult your doctor before starting any fasting practice, and follow your clinician's directions.

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

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    Information

    Seller
    Don Nguyen
    Size
    1.3 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
    Copyright
    © 2026 Don Nguyen
  • Privacy Policy

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