Zero is the world's most popular fasting app.
As seen in Women’s Health, Fortune, Men’s Health and more.
Unlock the power of intermittent fasting to improve your health and manage weight.
Zero’s advisory team includes some of the world’s leading doctors and researchers. It’s led by Chief Medical Officer Dr. Peter Attia, who guides our fasting protocols and content creation.
Reach your healthy weight goals no matter what diet you follow — from keto or low carb to simple calorie counting. With Zero’s expert guidance and straightforward fasting tracker, you’ll unlock the full longevity benefits of intermittent fasting.
FREE ZERO FEATURES
TIMER - Set your goal, start your timer, and 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 an all-new calendar view. Sync with Google Fit to track health markers like weight 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.
CHALLENGES - Opt in to Challenges that align with your goals, invite friends, unlock Achievements, and stay motivated with guidance from experts and the chance to win exclusive prizes.
ZERO PLUS PREMIUM FEATURES
Unlock all of the benefits of fasting with Zero Plus.
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 - See how your intermittent fasting practice correlates with other health markers like weight and heart rate. Spot trends and adjust your behavior to stay on target.
CUSTOM PRESETS - When your fasting needs are more unique than our popular presets, you can create your own.
With Zero, you can quickly start your fast based on science from leading researchers and health professionals.
• 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, 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 and imports the information into your fasting tracker.
• 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 can inadvertently help you eat less. It also promotes mindfulness, thus encouraging healthier, more conscientious choices around what you eat. Lastly, fasting enables your body to tap into its fat stores for fuel.
How do I track my health journey with Zero?
Simply visit your profile to access key metrics like activity, sleep, and time in Fasting Zones. You can even create custom charts to view correlations between metrics you’ve logged in your fasting tracker, like your fast length, weight, glucose, ketones, and more.

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