Atomic Fast

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About this app

Atomic Fast combines intermittent fasting with AI-powered meal logging to give you a complete picture of your metabolic health — all in one beautifully designed app.

SMART FASTING TIMER
Track your fasts with a real-time metabolic phase timer that shows exactly what's happening in your body. Move through five science-based phases — from digesting to fat burning to deep ketosis to autophagy — with clear visual feedback at every stage. Set custom fasting schedules (16:8, 18:6, 20:4, OMAD, or your own), adjust goals on the fly, and build streaks that keep you motivated.

AI MEAL LOGGING
Log entire meals in seconds. Point your camera at any plate and our AI instantly identifies every food item with full macro and micronutrient breakdowns. No more searching databases one ingredient at a time. You can also scan nutrition labels, search the USDA database, describe meals in plain text, or scan barcodes — whatever works best for you.

METABOLIC INSIGHTS
See how your meals and fasting patterns connect. Atomic Fast analyzes your data to surface daily insights about your metabolic health — calorie trends, macro balance, fasting consistency, and how your nutrition timing affects your body. Interactive charts let you explore correlations between fasting, eating, sleep, and activity.

HEALTH CONNECT INTEGRATION
Syncs with Health Connect for a unified health picture. Read sleep sessions, heart rate, steps, exercise, active calories, and weight — all feeding into your personalized insights and readiness score.

HEALTH READINESS SCORE
Wake up to a daily readiness score built from multiple health signals: sleep quality, HRV, resting heart rate, activity, exercise, and more. Understand at a glance whether today is ideal for an extended fast or a recovery day.

WATER TRACKING
Log water intake with a quick tap. Track daily hydration alongside your fasting and nutrition data. Smart hydration reminders keep you on track throughout the day.

DESIGNED FOR YOUR LIFESTYLE
• Four beautiful themes: Auto, Dark, Light, and Deep Purple
• Two timer styles: Atomic Ring and Classic Ring
• Smart notifications for fasting milestones, hydration, meal reminders, and weekly recaps
• Awards and streaks to celebrate your progress
• Privacy-first: your data stays on your device
• Secure token storage backed by Android Keystore encryption

ATOMIC+ SUBSCRIPTION
Get unlimited AI meal scans and unlock the full power of Atomic Fast. Free users get one AI scan per day to try it out.

• Atomic+ Monthly
• Atomic+ Annual (with 7-day free trial)

Privacy Policy: https://atomicfast.com/privacy
Terms of Service: https://atomicfast.com/terms

What’s new

Added comprehensive scientific citations throughout the app