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.
Cost / License
- Free
- Proprietary
Platforms
- Android
- iPhone
- Apple Watch
- Android Wear



Zero is the most popular Android & iPhone alternative to Fast Slow.
Zero is the most popular free alternative to Fast Slow.
- Zero is Free and Proprietary










































