Your body is always talking. Start listening. The most beautiful way to track fasting, metabolic stages, and your path to autophagy.
Currently Fasting
No complicated setup. No calorie counting. Just tap and start your fasting journey.
Choose from popular protocols like 16:8, 18:6, 20:4, or OMAD. One tap to begin tracking.
Watch your metabolic stages in real time. Get science-backed insights as your body transforms.
Build streaks, unlock achievements, and see your health metrics improve over time.
Built with precision for people who take their health seriously.
From your first hour of fasting through deep autophagy, watch your body shift through scientifically-documented metabolic states.
Stay on top of your water intake with smart reminders and daily tracking. Hydration is key during fasting windows.
Learn something new every day with curated research-backed tips about fasting, metabolism, and nutrition.
Detailed charts and statistics to visualize your fasting history, streaks, and long-term trends.
Feel your progress with carefully tuned haptic feedback at each metabolic milestone during your fast.
Beautiful home screen widgets for iOS and complications for Apple Watch. Your fast status at a glance.
Automatic sync with Apple Health. iCloud keeps your data seamless across all your Apple devices.
Six scientifically-documented metabolic stages your body enters while fasting.
Every feature in Fast Track Pro is grounded in peer-reviewed science.
Extended fasting triggers autophagy, where cells break down and recycle damaged proteins. This Nobel Prize-winning discovery is central to longevity research.
Ohsumi, 2016 Nobel Prize in PhysiologyIntermittent fasting triggers a metabolic switch from glucose to ketone utilization, improving brain function and physical endurance.
de Cabo & Mattson, NEJM 2019Studies show intermittent fasting is as effective as calorie restriction for weight loss, with better adherence and metabolic benefits.
Varady et al., Annual Review of NutritionResearch links time-restricted eating to improved blood pressure, cholesterol levels, and reduced markers of inflammation.
Wilkinson et al., Cell Metabolism 2020"The metabolic stage tracking is a game changer. I can actually see what's happening in my body. This keeps me motivated through every fast."
"Beautifully designed and works seamlessly across my iPhone and Apple Watch. The widgets are gorgeous and the haptics make it feel premium."
"The daily science tips have taught me so much about what fasting actually does. It's not just a timer, it's a whole education in metabolic health."
No pressure. The free tier is genuinely useful. Go Pro when you want the full experience.
One purchase. All platforms. Seamlessly synced via iCloud.
Full-featured app with widgets, Live Activities, and haptic feedback
Optimized layouts with rich analytics and split-view support
Standalone app with complications and glanceable timer
Native macOS app with menu bar access and notifications
Download Fast Track Pro for free and discover what your body can do. Available on iPhone, iPad, Apple Watch, and Mac.
Download on the App Store