Zero: Fasting & Health Tracker

Zero: Fasting & Health Tracker

By Big Sky Health

  • Category: Health & Fitness
  • Release Date: 2016-12-23
  • Current Version: 4.16.1
  • Adult Rating: 17+
  • File Size: 656.05 MB
  • Developer: Big Sky Health
  • Compatibility: Requires iOS 11.0 or later.
Score: 4.84952
From 329,188 Ratings


Unlock the power of intermittent fasting to lose weight and improve your metabolic health. Zero’s expert guidance, goal-based fasting plans, personalized insights, and advanced tracking can help you manage your weight, boost energy, reduce inflammation and live a longer, healthier life. Rooted in scientific research and backed by Zero’s Chief Medical Officer Dr. Peter Attia, use Zero to reach healthy weight loss goals and enjoy your favorite foods no matter what diet you follow - keto, low-carb, medetertanian, vegan, vegetarian, paleo, macros, intuitive eating or calorie counting. Featured in Women’s Health, The Tim Ferriss Show and more, Zero is the world’s most popular fasting app. Get started for free today. FAST TRACK YOUR GOALS TIMER - Set goals, track your fasts, and stay on track with Siri support and iOS 14 widgets. CUSTOM PLANS - Personalized protocols and adaptive recommendations help everyone from first-time fasters to advanced practitioners. SUSTAINABLE APPROACH - Adjust how long and how often you fast and enjoy your meals when you’re not fasting. MONITOR PROGRESS PERSONALIZED INSIGHTS - See how your fasting practice correlates with health markers like weight, heart rate, sleep, and blood glucose. Spot trends and adjust behaviors to stay on target. FASTING ZONES - Understand what's happening in your body to stay motivated to reach your goals. JOURNAL - Reflect on how you feel during your fasts. We'll graph your moods so you can track trends over time. GET GUIDANCE FROM EXPERTS PREMIUM CONTENT - Cut through the noise with an exclusive, ever-growing library of hundreds of videos, articles, audio segments, and Q&As from health experts like Dr. Peter Attia and Kanchan Koya PhD. HOLISTIC APPROACH - Learn about multiple facets of health, including metabolic health, mindful eating, gut health, inflammation, blood sugar, hormone health, hunger management, sleep health, exercise, and more. ASK ZERO - Submit your questions and tune in to get answers from experts. STAY ACCOUNTABLE AND GET SUPPORT CHALLENGES - Fasting is more fun with friends. Join seasonal events and group fasts that align with your goals. Stay motivated with guidance from experts and a chance to win exclusive prizes. ACHIEVEMENTS - Unlock achievements to celebrate fasting milestones and stay motivated. APPROACHABLE FASTING PLANS FOR EVERY BODY • 13-HOUR FAST, based on research by Dr. Satchin Panda (Salk Institute), this 13-hour or “Circadian Rhythm Fast” aligns your eating window with your body’s clock. • 16-HOUR FAST, or the 16:8 Intermittent Fast, used by celebrities, athletes, and millions of Zero users to manage weight. • 18-HOUR FAST, or 18:6 for more advanced fasters. • Other popular fasts include OMAD (one meal a day), 20:4 fast and custom prolonged fasts up to 7 days Track your progress on your iPhone or Apple Watch with Apple Health integration to sync your weight, resting heart rate and sleep. Download the Zero app to get started for free, or unlock premium features with Zero Plus. Payment for Zero Plus will be charged to your iTunes Account when you subscribe. Subscriptions automatically renew unless auto-renew is turned off at least 24-hours before the end of the current period. Manage your subscription by going to your Account Settings. Read more terms & conditions: Terms of use: Privacy policy:



  • Pretty straight forward!

    By LouHernandesz
    I love the UI of this application. It's pretty simple to follow, and this app gives you a ton of great information on fasting as well. The paid version also offers a ton of benefits and a more in-depth look at what's happening to your body during a prolonged period of fasting.
  • Best fasting app

    By JC chose me
    Keeps track excellent, cheers you on as your nearing your end of the fast. Allows you to keep notes on your current fast.
  • Bad app

    By Eminemilee
    Really only tracks how long you’ve fasted now how long you have to eat which is what I was looking for. The real reason I decided to write the review though was because even though I chose to use my Apple ID so they wouldn’t have my email they forced me to give them my email pretty unethical.
  • Great app

    By Goodgame9463;$4
    I’m not a fan of the new dashboard. It makes me want to jump ship to a new app. Would at least like the option of the old setup where you can see your longest fast of all time, longest streak, etc instead of just weekly data :((((((
  • Easy to use

    By YomogiBlue
    I used Zero over a year ago and it helped me to track my fasting hours and patterns. I started using it again a few days ago. I like the easy interface although I sometimes wish the “start fast” button was in a more prominent place.
  • Miss the old Zero

    By Carmen YB
    I’ve had the app for some time now. There use to be custom plan options to choose from to challenge yourself but that has been taken away.
  • Peggy

    By Peggy Surratt
    Love this app helping me keep track of my calories, weight, sleep, and exercise. Has additional information available to help you loose weight and health benefits.
  • Success

    By Fasting Queen
    This app has helped me to achieve goals I never thought I could ❤️
  • Great app for a fasting lifestyle

    By Darrell David
    I started a fasting lifestyle last year while doing my research on the benefits of fasting. This app is amazing
  • Love it!

    By KimberlySanders
    Has all the features that I have needed so far including the ability to edit and reminders. Very flexible and useful. If you need support and information about fasting I recommend this app.