Zero is the world's most popular fasting app. As seen in Womens Health, The Tim Ferriss Show, The Drive and more. Unlock the power of intermittent fasting to improve your health and manage weight. Zeros advisory team includes some of the worlds leading doctors 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 the full longevity benefits of fasting through Zeros expert guidance and content. TIMER - Set your goal, start your timer, stay on track. Well 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 into Challenges that align with your goals, invite friends, unlock Achievements, and stay motivated with guidance from our experts and the chance to win exclusive prizes. 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 - 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 fasting questions, then tune in 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 IN-THE-MOMENT MOTIVATION - Feeling hungry? Log 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. -HOUR FAST, or the : Intermittent Fast, 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 -hour fast starts around sunset to align your eating window with your bodys clock. Zero automatically calculates the daily sunset for you. Choose your favorite fasting protocol and Zero will track your progress on your Android device with Google Fit integration to sync your weight and sleep. 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 -hours before the end of the current period. Manage your subscription by going to your Account Settings.