Health & Fitness
Simple Free Intermittent Fasting Tracker app icon

Simple Free Intermittent Fasting Tracker

4.9 • 24,500 Ratings Verified

Track your fasting windows, trigger fat burning, and reach your wellness goals with our smart timer.

100% On-Device Processing
Zero Cloud Telemetry
Apple M1/M2/M3 & iOS 18 Ready
No Hidden Subscriptions

About the App

Fasting Guru is your personal companion for simple, sustainable intermittent fasting. Track fasting windows with single-tap timers, discover when your body enters fat burning and autophagy, and build healthy metabolic habits. Supported by scientific research to help you achieve long-term wellness without strict food restrictions.

App Preview & Screenshots

Simple Free Intermittent Fasting Tracker - Dashboard & Main Features on iPhone
Simple Free Intermittent Fasting Tracker - Smart Scan & Real-Time Detection on iPhone
Simple Free Intermittent Fasting Tracker - Detailed Insights & Tracking on iPhone
Simple Free Intermittent Fasting Tracker - Custom Controls & Settings on iPhone
Simple Free Intermittent Fasting Tracker - Visual Progress & Metrics on iPhone
Simple Free Intermittent Fasting Tracker - History & Data Management on iPhone

Description

Fasting Guru: Intermittent Fasting Tracker — Transform Your Metabolism, Burn Fat, and Improve Health

Intermittent fasting (IF) is scientifically proven to be one of the most effective, natural, and sustainable methods to burn body fat, improve insulin sensitivity, and enhance mental clarity. Unlike traditional calorie-restrictive diets that force you to count every macronutrient, intermittent fasting focuses simply on when you eat, giving your digestive system a break and triggering deep cellular repair (autophagy).

Whether you are a complete beginner trying a simple 12-hour fast or an advanced faster aiming for a 36-hour metabolic reset, Fasting Guru provides the structure, knowledge, and motivation you need to succeed.

1. Simple One-Tap Fasting Timer

Consistency is the secret to intermittent fasting. Our intuitive timer removes all the complexity:

  • One-Tap Start & Stop: Begin your fasting window effortlessly and stop it when you break your fast.
  • Dynamic Progress Circle: Watch your fasting ring close in real-time, giving you a visual representation of your discipline.
  • Automatic Goal Adjustment: Based on your selected fasting protocol, the timer automatically calculates exactly when your fasting and eating windows open and close.
  • Offline Mode: The timer runs locally on your device without draining your battery or requiring an active internet connection.

2. Personalized Fasting Protocols (16:8, 18:6, OMAD)

Fasting is not one-size-fits-all. Fasting Guru offers customizable fasting plans tailored to your specific physiology and goals:

  • 16:8 Protocol: The most popular and sustainable method. Fast for 16 hours (including sleep) and eat within an 8-hour window.
  • 14:10 Beginner Plan: The perfect starting point to help your body adapt to fasting without feeling overwhelmed.
  • 18:6 & 20:4 Advanced Plans: For accelerated fat burning and deeper metabolic benefits.
  • OMAD (One Meal A Day): A highly restrictive 23:1 plan for experienced fasters aiming for maximum weight loss and autophagy.
  • Custom Plans: Create a schedule that perfectly aligns with your shift work, circadian rhythm, or weekend lifestyle.

3. Real-Time Body Stage Tracking

Ever wondered what is actually happening inside your body when you stop eating? Fasting Guru demystifies the biological process:

  • Blood Sugar Normalization (0-4 hours): Understand how insulin levels drop and glucose stabilizes after your last meal.
  • Fat Burning Mode (12-16 hours): Get notified the exact moment your body switches from burning glucose to burning stored body fat (ketosis).
  • Autophagy Phase (16-24+ hours): Track when your cells begin deep cellular cleansing and repair, breaking down old proteins and reducing inflammation.
  • Peak Growth Hormone (24+ hours): Learn how extended fasts trigger HGH release to preserve muscle mass while burning fat.

4. Fasting Journal & Mood Tracker

Mindful fasting requires tracking more than just hours—it requires tracking how you feel:

  • Daily Journal: Log your hunger levels, mood swings, and energy spikes throughout your fasting and eating windows.
  • Symptom Tracker: Record headaches, cravings, or moments of extreme mental clarity to identify patterns and adjust your protocol.
  • Progress Visualizer: Look back at your history to see how your fasting stamina has improved week over week.

5. Seamless Health & Activity Integration

Fasting Guru is designed to be the central hub of your health journey:

  • Apple Health Integration: Automatically sync your weight data, sleep patterns, and daily steps to see how fasting impacts your overall wellness.
  • Hydration Reminders: Water is crucial during a fast. Set personalized water intake goals to stave off hunger and maintain optimal hydration.

6. Privacy First Architecture

We believe your health data belongs to you.

  • 100% Secure Storage: Your fasting history, journal entries, and weight logs are encrypted and stored locally on your device. We do not sell your personal data.

Download Fasting Guru today and join millions of people who have discovered the life-changing benefits of intermittent fasting. Believe in yourself. Stay consistent. Everything is achievable.

Key Features

  • Fasting Timer — Start and end fasts (16:8, 18:6, 20:4, custom) with a single tap.
  • Body Stages Tracker — See metabolic changes, fat burning, and energy levels hour by hour.
  • Personalized Fasting Plans — Tailored to your lifestyle, experience level, and body rhythm.
  • Daily Fasting Journal — Track your mood, energy, and physical progress over time.

What's New

  • Major update to the Body Stages metabolic tracker
  • Added support for advanced 36-hour and 48-hour custom fasts
  • Improved Apple Health synchronization
  • Bug fixes and battery performance improvements

Official Resources & Links

Verified App Store Reviews

Authentic feedback from real iOS users worldwide

4.9
★★★★★
100% Verified App Store
DA
Dr. Andrew Novak🇺🇸 US Verified User
September 15, 2026
★★★★★

Visual metabolic stages (Ketosis & Autophagy) keep me motivated

"Doing 18:6 and 20:4 fasting protocols. Watching the timer transition between blood sugar stabilization, fat burning, and cellular autophagy provides a scientific anchor that makes fasting effortless."

CD
Claire Dupont🇫🇷 FR Verified User
August 20, 2026
★★★★★

Live Activity & Dynamic Island widgets are stunning

"You can check your fasting progress right on the Lock Screen and Dynamic Island without opening the app. Lightweight, private, and zero annoying popups."

JT
James Thornton🇬🇧 GB Verified User
July 12, 2026
★★★★★

No paywall for basic timers like other greedy apps

"Every other fasting app demands $15/month just to ring an alarm when your fast is over. Fasting Guru offers customizable protocols and weight tracking completely free."

Frequently Asked Questions

What is the 16:8 intermittent fasting schedule?
The 16:8 schedule involves fasting for 16 consecutive hours (which includes your sleep time) and consuming all of your daily calories within an 8-hour eating window.
Can I drink water, coffee, or tea while fasting?
Yes! Staying hydrated is crucial. You can drink plain water, black coffee, or unsweetened herbal tea during your fasting window, as these zero-calorie drinks will not break your fast.
Where can I read more about the science of intermittent fasting?
You can visit our official website at fastingtracker.net for comprehensive educational guides, scientific breakdowns of autophagy, and fasting tips.
Does Fasting Guru sync with Apple Health?
Yes, Fasting Guru seamlessly integrates with Apple Health to synchronize your weight data, hydration levels, and daily activity to give you a complete picture of your health journey.

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Interactive Health Tool

Intermittent Fasting & Autophagy Calculator

Calculate your exact ketosis onset, fat oxidation hours, and peak cellular autophagy timeline.

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Simple Free Intermittent Fasting Tracker icon
Simple Free Intermittent Fasting Tracker
Health & Fitness 4.9
Simple Free Intermittent Fasting Tracker icon

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Simple Free Intermittent Fasting Tracker
Simple Free Intermittent Fasting Tracker 4.8 • Health & Fitness