Zero is the world's most popular fasting app.
An intuitive tracker with essential fasting tools.
Harness the power of intermittent fasting to improve your health.

Now, with Zero Plus, we bring all new premium features to millions of fasters.

Zero’s advisory team includes some of the world’s leading doctors and researchers, including our Chief Medical Officer Dr. Peter Attia, who guides our fasting protocols and content creation.


TIMER - Set your goal, start your timer, stay on track. We’ll be with you from start to finish with reminders and insights to keep you motivated.

LEARN - Fuel your fast with our ever-growing content library curated by Chief Medical Officer, Dr. Peter Attia.

STATISTICS - Chart your progress and map your journey, with the option to sync with Apple Health. We’ll help you track health markers like weight, resting heart rate, and sleep, to see how they evolve with your fasting practice.

JOURNAL - Reflect on how you feel during your fasts. We'll graph your moods so you can track trends and adjust over time.


Unlock all of the benefits of fasting with Zero Plus.

CUSTOM PLANS - Fast track your fasting goals with a personalized protocol and adaptive recommendations from our team of experts.

PREMIUM CONTENT - Cut through the noise with an exclusive, ever-growing library of videos, articles, audio segments, and Q&As from fasting experts like Dr. Peter Attia.

FASTING ZONES - Know what's happening in your body so you can stay motivated to reach key metabolic milestones.

ADVANCED STATISTICS - Chart your fasting journey. Track your time spent in each Fasting Zone. See how your fasting practice correlates with other health markers. Spot trends and adjust your behavior to stay on target.

ASK ZERO - For all those times a question pops into your mind mid-fast, Ask Zero is here to help. Submit your fasting questions, then tune in for a chance to get answers from experts like Dr. Peter Attia. What could be better than having an expert in your pocket?

CUSTOM PRESETS - When your fasting needs are more unique than the most popular presets, you can create your own. Name your fasting type and save it to your favorites.

ADVANCED JOURNAL WITH IN-THE-MOMENT MOTIVATION - Feeling hungry? Log your mood and receive responsive content including exclusive Fasting Meditations.

With Zero and Zero Plus you can quickly start your fast based on science from leading doctors and researchers.

• 16-HOUR FAST, or the 16:8 Intermittent Fast, used by celebrities like Hugh Jackman and Halle Berry when preparing for blockbuster films

• CIRCADIAN RHYTHM FAST, based on research by Dr. Satchin Panda (Salk Institute), this 13-hour fast starts around sunset to align your eating window with your body’s clock. Zero automatically calculates the daily sunset for you.

• 18-HOUR FAST, or 18:6 for more advanced fasters

• Other popular fasts include OMAD (one meal a day), 20:4 fast and custom fasts up to 7 days

• Earn BADGES to celebrate your milestones and stay motivated

• Stay accountable with GROUP FASTS and special events

Choose your favorite fasting protocol and Zero will track your progress on your iPhone or Apple Watch with APPLE HEALTH integration to sync your weight, resting heart rate and sleep.

Zero Plus terms:

Payment will be charged to the credit card connected to your iTunes Account when you confirm your subscription purchase. Subscriptions automatically renew unless auto-renew is turned off at least 24-hours before the end of the current subscription period. You may manage your subscription by going to your Account Settings.

Read more about our terms & conditions:
Terms of use:
Privacy policy:


Versie 4.0.11

Hi Zero crew,

Today’s release fixes bugs and performance issues in the app.

Thank you for your continued feedback and support.

Wishing you well,
Team Zero

Beoordelingen en recensies

4.7 van 5
3.3K beoordelingen

3.3K beoordelingen

rXwvr ,

Perfect for tracking your fasting

This is such a simple, yet powerful app. It's a shame that other diet tracking apps don't have the ability to track fasting data or only offer it as part part of a subscription. I'm glad I have this standalone app instead.

0x4e71 ,

Bye bye

Locked me out of my fasting data by introducing mandatory registration with this update. Another good app gone bad.
Good bye

Thiago Ochsendorf ,


What the hell you guys did in this last update? The app looks really bad now. This premium thing also looks pretty bad. I’m disappointed.


Big Sky Health, Inc.
239.4 MB

Vereist iOS 11.0 en watchOS 4.0 of later. Compatibel met iPhone, iPad en iPod touch.



Regelmatig/Intense medische/behandelingsinformatie
In-app aankopen
  1. Zero Plus Subscription € 10,99
  2. Zero Plus Subscription € 54,99
  3. Zero Plus Subscription € 10,99


  • Delen met gezin

    Tot zes gezinsleden kunnen deze app gebruiken als Delen met gezin staat ingeschakeld.

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