Zero is the leading intermittent fasting app, providing fasting timers, tracking, and educational content about fasting protocols. Founded with input from fasting researcher Dr. Peter Attia, the app tracks fasting and eating windows, provides insights on fasting zones (ketosis, autophagy), and offers guided fasting programs. Zero Plus (premium) adds advanced stats, coach guidance, and recipes.
Zero is the most downloaded intermittent fasting app, benefiting from the broader fasting and metabolic health trend. It competes with other fasting trackers and with broader health apps that include fasting features. The fasting app market is relatively niche but growing as intermittent fasting gains mainstream acceptance as a health practice.
Fasting app with gamification elements, water intake tracking, and recipe database. Step challenges and streaks drive engagement. Free tier with more features than Zero's free version.
Fasting tracker with AI coaching for personalized guidance. Food tracking integration and mood logging. Focuses on behavioral change alongside fasting timing. Strong onboarding with personalized plans.
Fasting app with social circles for group fasting challenges. Connected to LifeOmic's precision health platform. Community features create accountability that solo fasting apps lack.
The dominant calorie and nutrition tracker with the largest food database. Not fasting-specific but many users combine it with intermittent fasting. Broader utility for overall nutrition management.
Zero's success is tied to intermittent fasting's popularity. If fasting trends decline or health authorities issue warnings, the entire category is at risk. Diversifying into broader metabolic health could reduce this dependency.
A fasting timer is inherently simple, making it difficult to justify premium pricing for what is essentially a countdown clock. Adding nutritional guidance, health metrics integration, and coaching expands value but moves Zero into competition with broader health platforms.
Integrating with wearables and health platforms (Apple Health, glucose monitors) could make Zero a hub for metabolic health rather than just fasting timing. This positions the app alongside the quantified self movement and continuous glucose monitoring trend.
Zero competes with Fastic (gamified fasting), Simple (AI fasting coach), LIFE Fasting Tracker (social fasting), and broader nutrition apps like MyFitnessPal that users combine with fasting protocols. Zero remains the most recognized name in dedicated fasting apps.
Zero's free tier provides basic fasting timer and tracking. Zero Plus adds fasting zones, advanced stats, coach guidance, and recipes. The premium is worth it for users committed to fasting who want deeper insights; casual fasters may find the free tier sufficient.
Zero is the most popular and best-known fasting app with strong scientific backing. Fastic offers more gamification, Simple provides AI coaching, and LIFE adds social features. The best choice depends on whether you prefer simplicity (Zero), gamification (Fastic), or coaching (Simple).