Zero is the world’s most popular fasting app.
As seen in Women’s Health, The Tim Ferriss Show, The Drive and more.
Unleash the power of intermittent fasting to improve your health and manage your weight.

Zero’s advisory team includes some of the world’s leading physicians and researchers, including our 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 – and unlock all the longevity benefits of fasting with Zero’s expert advice and content.

ZERO FREE FEATURES

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

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

STATS – Chart your progress and chart your course with an all-new timeline view. Sync with Google Fit to track health markers like weight and sleep to see how they change with your fasting practice.

JOURNAL – Reflect on how you feel during your fast. We’ll graph your moods so you can track trends and adjust over time.

CHALLENGES – Participate in challenges that match your goals, invite friends, unlock achievements and stay motivated with advice from our experts and the chance to win exclusive prizes.

ZERO PLUS PREMIUM FEATURES
Unlock all the benefits of fasting with Zero Plus.

PERSONALIZED PLANS – Accelerate your fasting goals with a personalized protocol and adaptive recommendations from our team of experts.

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

FASTING ZONES – Know what’s going on in your body so you stay motivated to hit key metabolic milestones.

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

ASK ZERO – An expert in your pocket. Submit your questions about fasting, then log on for a chance to get answers from experts like Dr. Peter Attia.

CUSTOM PRESETS – When your fasting needs are more unique than our popular presets, you can create your own.

ADVANCED JOURNAL WITH IMMEDIATE MOTIVATION – Hungry? Register your mood and receive responsive content, including exclusive fasting meditations.

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

• 16-HOUR FAST, or 16:8 Intermittent Fast, used by celebrities when preparing for blockbuster movies and millions of Zero users to manage their weight.

• CIRCADIAN RHYTHM FAST, based on research by Dr. Satchin Panda (Salk Institute), this 13-hour fast begins at 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 fasting and custom fasting up to 7 days

• Unlock achievements to celebrate milestones and stay motivated

Choose your preferred fasting protocol and Zero will track your progress on your Android device with Google Fit integration to sync your weight and sleep.

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