Zero is a beautifully designed tracker used for intermittent, circadian rhythm, and custom extended fasting. As the largest app-based fasting community in the world, Zero makes it simple for you to harness the power of fasting to improve your health.

Zero’s advisory team includes some of the world’s leading doctors and researchers, including our Chief Medical Officer Dr. Peter Attia, who guides our fasting protocols and content creation.

Zero makes fasting simple:

* A beautiful, thoughtful design makes it simple to start fasting
* Earn badges to celebrate your fasting milestones and stay motivated
* Set a weight goal and track your progress
* Visualize your fasting progress over time
* Reflect on your fasting experience with the post-fast journal
* Weekly articles created by our expert content team to keep you informed and motivated
* Group fasts and events with prizes from the biggest names in health and fitness

Quickly start your fast based on science from leading doctors and researchers.

* 16 hour fast, known as the 16:8 Intermittent Fast, used by Hugh Jackman and Dwayne “The Rock” Johnson when preparing for blockbuster films
* Circadian Rhythm Fast, based on research by Dr. Satchin Panda (Salk Institute), this 13 hour fast starts at or before sunset. Zero automatically calculates the daily sunset time based on your location
* Other popular fasts include the 18:6 fast, 20:4 fast and custom fasting up to 7 days long

Zero is fasting made simple. Join the largest fasting community in the world!