LockFast

Intermittent Fasting Timer

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

LockFast is the fasting timer built for people who take performance seriously. No meal plans. No calorie counting. No social feeds. Just a precision timer that tracks your metabolic state in real time and tells you exactly where you are in your fast. REAL-TIME METABOLIC ZONES LockFast tracks four metabolic phases as you fast: • Fed — digesting and storing energy (0-4h) • Fat Burning — glycogen depleting, fat mobilizing (4-12h) • Ketosis — producing ketones for fuel (12-16h) • Autophagy — cellular cleanup and renewal (16h+) Watch your progress ring fill as you move through each zone. A countdown shows exactly when you'll hit the next phase. FOUR PROVEN PROTOCOLS Choose the fasting window that fits your life: • 16:8 — the gold standard for beginners • 18:6 — intermediate, deeper fat burning • 20:4 — advanced, extended ketosis • OMAD — one meal a day, maximum autophagy Each protocol includes a full description of what to expect, example timing, and who it's best for. WATER TRACKING Stay hydrated during your fast with built-in water tracking. Quick-add buttons for 250mL, 500mL, and 750mL. Visual progress ring and daily goal tracking. Your body needs water to metabolize fat — LockFast makes sure you don't forget. EATING WINDOW TIMER When your fast ends, LockFast automatically starts an eating window countdown so you know exactly when to begin your next fast. No guesswork, no math. STREAKS & STATS Track your current streak, longest streak, total fasted hours, and average fast duration. A weekly bar chart shows your last 7 days at a glance — the visual accountability that keeps you consistent. SESSION SUMMARIES Every completed fast gets a summary card showing your duration, peak metabolic zone reached, and current streak. The moment of accomplishment that builds the habit. BUILT FOR FOCUS LockFast doesn't try to be a nutrition app, a workout tracker, or a social network. It does one thing — tracks your fast — and does it exceptionally well. Dark interface. Clean design. Zero distractions. Start your first fast in under 60 seconds. Terms of Use (EULA): https://lockfast.io/#terms

Ratings & Reviews

  • This app hasn’t received enough ratings or reviews to display an overview.

Re-ordered Screenshots for App Store and added a new App Icon.

Version 1.0.1

The developer, Dirk Wood, 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
    • Dirk Wood
    Size
    • 1.3 MB
    Category
    • Health & Fitness
    Compatibility
    Requires iOS 26.2 or later.
    • iPhone
      Requires iOS 26.2 or later.
    • iPad
      Requires iPadOS 26.2 or later.
    • Mac
      Requires macOS 26.2 or later and a Mac with Apple M1 chip or later.
    • Apple Vision
      Requires visionOS 26.2 or later.
    Languages
    • English
    Age Rating
    4+
    In-App Purchases
    Yes
    • Weekly $3.99
    • LifeTime $149.99
    • Annual $49.99
    • Learn More
    Copyright
    • © 2026 Dirk Wood
  • Developer Website
  • Privacy Policy

    • You Might Also Like