Zero - Intermittent Fasting

60.2K reviews
Content rating
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About this app

Zero is the world's most popular intermittent fasting app.
As seen in Women’s Health, Fortune, Men’s Health, The Joe Rogan Experience and more.
Unlock the power of intermittent fasting to improve your health and lose weight without counting calories or dieting.

Reach your healthy weight goals no matter what diet you follow — from keto or low carb to paleo - and never count calories again. With Zero’s expert guidance and simple intermittent fasting tracker, you’ll unlock the full benefits of intermittent fasting to lose weight and burn fat faster.


TIMER - Set your intermittent fasting goal, start your timer, and stay on track with reminders and insights to keep you motivated on your weight loss journey without the need to count calories.

LEARN - Fuel your intermittent fasting with our ever-growing content library.

STATISTICS - Chart your progress and map your weight loss journey. Sync with Google Fit to track health markers like weight and sleep to see how they evolve with your intermittent fasting practice.

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

CHALLENGES - Opt in to Challenges that align with your health goals, invite friends, unlock Achievements, and stay motivated with guidance from weight loss and fasting experts.

Unlock all of the benefits of intermittent fasting with Zero Plus to lose weight and burn fat faster.

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

FASTING ZONES - Know what's happening in your body so you can stay motivated to lose weight and keep it off without dieting or counting calories.

ADVANCED STATISTICS - See how your intermittent fasting practice correlates with other health markers like weight loss. Spot trends and adjust your behavior to stay on target.

• 16-HOUR FAST, or the 16:8 intermittent fast, is used by celebrities when preparing for blockbuster films and millions of Zero users to manage weight.

• CIRCADIAN RHYTHM FAST, this 13-hour intermittent fast starts at sunset to align your eating window with your body’s clock. Zero automatically calculates the daily sunset for you.

• 18-HOUR FAST, or the 18:6 intermittent fast, is for more advanced fasters.

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

• Unlock Achievements to celebrate milestones and stay motivated.

Got questions? We have answers.

Can intermittent fasting help me lose weight?

Yes! Fasting alters how often you eat, which helps you eat less without counting calories or going on a diet. Intermittent fasting also encourages healthier, more conscientious choices around what you eat. Finally, intermittent fasting enables your body to tap into its fat stores for fuel so that you burn fat faster.

Zero Plus terms:

Payment will be charged to the credit card connected to your Google 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:
Updated on
Sep 28, 2023

Data safety

Safety starts with understanding how developers collect and share your data. Data privacy and security practices may vary based on your use, region, and age. The developer provided this information and may update it over time.
This app may share these data types with third parties
Device or other IDs
This app may collect these data types
Location, Personal info and 5 others
Data is encrypted in transit
You can request that data be deleted

Ratings and reviews

59.7K reviews
Tiffany F.
September 14, 2023
Free version does exactly what it should w/o any frustrating ads or unnecessary features. The premium features are useful things that in my opinion are worth the price. Unfortunately I can't afford it, but I'll continue to enjoy the free version for effortlessly logging & tracking my fasting & weight over time. I came back to this after a long hiatus & it's definitely the best one I've used. UI is clean & simple. Only con is needing internet to open the app. Logging my fast offline is preferred
13 people found this review helpful
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Shelli Allen
September 19, 2023
I have been using Zero for a few years now. It's great for tracking fasting times and has great information on fasting. I love the short videos. The only thing I miss and wish were still available is the option to schedule a week of fasts. That would help me keep my fasting on track. Please bring it back!
5 people found this review helpful
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Susan Sostack
August 18, 2023
The mood journal still seems to be hit and miss, same for meal entries. I am not going to pay to get better things. I can do my meal logging on Atkins at no charge, with many foods built-in to the app. But tracking my fasts is the primary reason for using it. Keeps me motivated when I look at the calendar and can see my progress
11 people found this review helpful
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