App overview and origin
Zero — Intermittent Fasting is a free lifestyle app designed to support weight-loss plans and strength-building goals. Created by Zero Longevity Science Inc., it ranks among the more popular fasting apps on app stores and has been installed by over a million people. If you’re looking for alternatives, Huawei Health is often suggested as a no-cost option.
Installation and pricing model
The app can be downloaded at no charge, but unlocking unlimited features requires a paid subscription. Note that the application does not offer offline functionality, so an internet connection is necessary for full use.
Customized eating approaches
Choose from a variety of nutrition strategies tailored to your objectives. Options include:
- Calorie counting
- Intuitive eating
- Flexible macronutrient tracking (macros)
- Paleo
- Plant-based (vegan)
- Mediterranean-style eating
- Lower-carbohydrate plans
- Ketogenic approach
You can pick a program that matches your health targets and further tweak settings to reflect your fasting experience and personal preferences.
Fasting schedules available
Zero offers several common fasting windows to suit different lifestyles:
- One-Meal-A-Day (OMAD)
- 18-hour fast
- 16-hour fast
- 13-hour fast
Each protocol can be adjusted and combined with adaptive recommendations based on your progress.
Tracking tools and personalization
The app provides multiple features to help you monitor progress:
- A timer that can be linked with Siri for reminders and fast tracking
- A journal for recording moods, energy levels, and how different fasts affect you
- Science-backed guidance overseen by the program’s Chief Medical Officer, Dr. Peter Attia
These tools help you identify patterns over time and determine which approach increases your energy and wellbeing.
Social features and events
If team motivation helps you stay consistent, Zero runs seasonal challenges and group fasting events that let you fast alongside others for added accountability.
Strengths and drawbacks
Strengths:
- Evidence-informed guidance developed by licensed experts
- Wide selection of diet and fasting programs
- Useful tracking, journaling, and smart-assistant integration
Drawbacks:
- Requires subscription for unrestricted access
- No offline mode available
Conclusion
Zero — Intermittent Fasting is a well-regarded companion for people aiming to lose weight or improve fitness through time-restricted eating. Its expert-backed advice and flexible tools make it suitable for beginners and experienced fasters alike, but consider the subscription and the lack of offline capability before committing.
Technical
- Android
- Free