Atomic Fast: Fasting & Diet

Atomic Fast: Fasting & Diet

AI Calorie & Meal Tracker

27 ratings
26 reviews
Free
In-App Purchases

Details

  • Released
  • Updated

Features

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About

This app combines intermittent fasting with AI-powered calorie and macro tracking. It analyzes your eating patterns, hydration, sleep, and activity to provide metabolic insights and a daily readiness score. Seamlessly integrates with Apple Health for a holistic view of your well-being.

AI calorie and macro estimation from photos
Intermittent fasting timer with metabolic phases
Break-fast meal scoring and suggestions
Connects meals and fasts for holistic insights
Daily readiness score based on health signals
Apple Health and Apple Watch integration
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What's New in Atomic Fast

1.3.1

August 10, 2026

Fixes: a notification tap could restart a running fast, and ended fasts could vanish from history. Safer iCloud backup restore after reinstall. Health and Meals also load faster if you have a lot of history.

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Subscription plans

Atomic+ Monthly

Unlimited AI meal scans and premium features

$4.991 Month
How to cancel Atomic Fast subscription ⁉️
1

In-App Purchases

$59.99

Atomic+ Lifetime

One-time purchase. Unlimited AI meal scans and all.

Events

Read more about Cloud Backup & Sync

Cloud Backup & Sync

Your fasting data, safe across all your devices.

May 13, 2026 Jun 13, 2026

User reviews

Barcode scanner

Pls fix the barcode scanner feature, it doesn’t input the correct nutrition compared to the labels. Im looking for an accurate app.. plspls fix this

Amazing

Clean, easy to use and genuinely helpful. The fasting timer is great, and the AI meal logging makes tracking food much easier.

Beautifully designed, super easy to stick with

The UX is what sold me clean, intuitive, and genuinely well thought out. It’s designed in a way that makes building the fasting/eating habit feel rewarding instead of like a chore, which is rare for a tracking app. Logging is effortless, the AI handles calorie counting for you, and the Apple Health integration pulls everything together so you’re not manually entering data all day. Feels like a proper “super app” for fasting and mindful eating rather than just another timer. Highly recommend.
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Calorie logging feels effortless

I usually don’t enjoy logging calories because it feels like extra work, but Atomic Fast makes it easier. It’s simple enough to use every day without getting tired of it.

Smooth meal and calorie tracking

The calorie tracking experience is one of the best parts of Atomic Fast. Logging meals feels quick and it helps me stay aware of what I eat while keeping my fasting routine on track. Great app for fasting and mindful eating.

Developer apps

FAQ

What is Atomic Fast?

Atomic Fast is a health and fitness app that combines intermittent fasting tracking with AI-powered calorie and macro counting. It helps users understand how their eating habits, fasting schedules, and daily activities connect to their overall metabolic health.

How does Atomic Fast track calories?

Atomic Fast uses AI to estimate calories, macros, and nutrients by analyzing a photo of your meal, typically in under 5 seconds. You can also log meals by text, voice, scanning barcodes, or searching a database.

What fasting schedules does Atomic Fast support?

Atomic Fast supports popular fasting schedules like 16:8, 18:6, 20:4, and OMAD, and also allows users to create their own custom plans. It provides a real-time timer and guidance on metabolic phases.

Does Atomic Fast integrate with Apple Health?

Yes, Atomic Fast syncs with Apple Health, importing 24 data types including sleep, heart rate, HRV, steps, and workouts. It also writes meal and water data back to Apple Health.

What is the Break-Fast Score?

The Break-Fast Score is a feature that evaluates your first meal after a fast on a scale of 0 to 100. It offers practical suggestions for protein, fiber, and carbohydrate balance to aid in a smoother transition back to eating.

How does Atomic Fast provide metabolic insights?

Atomic Fast helps you spot patterns by connecting your fasting, meals, hydration, sleep, heart rate, activity, and more. Interactive charts and daily insights highlight trends in calorie intake, macro balance, and how nutrition timing affects sleep and energy.

What are the subscription options for Atomic Fast?

Atomic Fast offers 'Atomic+ Monthly' for $4.99 per month and 'Atomic+ Annual' for $29.99 per year. The annual plan includes a 7-day free trial.

Is Atomic Fast suitable for beginners?

Atomic Fast is designed for people who already fast and want more than a basic timer or food diary. Its comprehensive features and insights may be best suited for users with some experience in intermittent fasting and dietary tracking.