Zero - Intermittent Fasting

4.0
60.8K reviews
1M+
Downloads
Content rating
Mature 17+
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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.

FREE ZERO FEATURES

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.

ZERO PLUS PREMIUM FEATURES
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: https://www.zerolongevity.com/terms-of-use
Privacy policy: https://www.zerolongevity.com/privacy-policy
Updated on
Nov 14, 2024

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

4.0
60.4K reviews
Mark R. Monaco
October 30, 2024
I like the interface, but there's several things that seem to be broken in the Free version. For example, streaks & milestones are not being earned or incremented. Also, the week view for the Total Fasting Hours chart is not accurate. It has not shown anything since 10/28 and the hours that are displayed for that day do not even reflect what was recorded for the fast itself. -- If you don't care about any of that stuff and just want to track your fast each day, the Today & Calendar views work.
20 people found this review helpful
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Oren
July 29, 2025
Pretty buggy. It does what it needs to do, but for certain prompts, I have to click through 2-3 times for it to go through. Fitbit sync doesn't really work, and the function to add activity isn't working. There's no way the premium version is worth $10 a month; think of the value that other subscriptions offer for less. Better, free apps exist.
1 person found this review helpful
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Rhonda
August 1, 2025
I want to love this app. This app has everything I've ever wanted in a food diary app. But I'm having one major issue that I just cannot abide by. Logging food is abysmal! I can't take a picture in the app because it never loads. I can't type my description of the food too fast, or else the app will lag and the letters get jumbled up. The app says I've logged 10 meals, I haven't, it's just buggy as all get out 🙄. This app needs an overhaul quick, fast and in a hurry
1 person found this review helpful
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What’s new

Thanks for using Zero!

In this release, you’ll find a number of performance improvements and fix for bug some people were experiencing when opening the app.

If you have any feedback or questions, please contact our Support team at zerolongevity.com/support