Atomic Fast: Fasting & Diet

Name: Atomic Fast: Fasting & Diet
Rating: 5 (24 reviews)
Author: Startise

AI Calorie & Meal Tracker

Free · In‑App Purchases · Designed for iPad. Not verified for macOS.

24 Ratings
Age Rating

9+
Years
Category

Health & Fitness
Developer

Startise
Language

EN
English
Size

17
MB

Snap a photo of your meal to estimate calories, macros, and nutrients in seconds. Track your fasts. See how your eating patterns, hydration, sleep, and activity connect over time. AtomicFast combines intermittent fasting, AI calorie tracking, macro counting, Apple Health insights, and hydration tracking in one app — made for people who already fast and want more than just a basic timer or food diary. FASTING TIMER WITH METABOLIC PHASES Track your fasts with a real-time fasting timer and estimated metabolic phase guidance. Follow your progress through clear visual stages, from digestion and transition to glycogen depletion, fat burning, deeper fasting, and autophagy. Tracking your fast is easy, zero hassle. Choose popular fasting schedules like 16:8, 18:6, 20:4, OMAD, or create your own custom plan. Adjust your goals anytime, and get fasting milestone notifications without the pressure. AI CALORIE TRACKING IN SECONDS Take a photo of your plate. AtomicFast typically identifies foods in under 5 seconds and estimates calories, macros, and nutrients — like a smart AI calorie counter and macro tracker that actually understands what you ate. You can also log meals by: - Describing what you ate with text or voice - Scanning nutrition labels - Scanning barcodes - Searching the USDA food database - Adding meals manually when needed No more typing one ingredient at a time just to understand what you ate. BREAK-FAST SCORE The first meal after a fast matters. AtomicFast scores your break-fast meal from 0 to 100, with practical suggestions on protein, fiber, carbs, and balance for a smoother transition back into eating. MEALS AND FASTS THAT WORK TOGETHER Most fasting apps track time. Most calorie trackers and food diaries track food. AtomicFast connects both. See how your last meal affects your next fast, how your fasting consistency affects your eating patterns, and how nutrition timing may connect with sleep, recovery, and daily energy. METABOLIC INSIGHTS AtomicFast helps you spot patterns across fasting, meals, hydration, sleep, heart rate, HRV, activity, and more. Interactive charts and daily insights help you understand habits like calorie trends, macro balance, fasting consistency, and how nutrition timing may connect with sleep, recovery, and energy levels. Daily insight examples: - "Ending eating by 7 PM dropped your sleeping heart rate by 4 bpm last week" - "On high-recovery days you hit your fasting goal 30% more often" Insights are calculated on your device. Your patterns stay yours. DAILY READINESS SCORE Wake up to a readiness score from key health signals: sleep, HRV, resting heart rate, activity, exercise, and respiratory rate. A simple guide to whether today is a good day to push your fast, stay normal, or focus on recovery. APPLE HEALTH AND APPLE WATCH AtomicFast syncs 24 Apple Health data types: sleep, heart rate, HRV, steps, workouts, weight, respiratory rate, and more. Meals write 11 nutrients plus water back to Apple Health, keeping your nutrition data connected across your favorite health apps. HYDRATION TRACKING One-tap water logging. Smart reminders that fit naturally around your fasting routine. BUILT FOR EVERYDAY USE - Three themes including a signature Deep Purple mode - Two timer styles: Atomic Ring and Classic Ring - Smart notifications for fasting milestones, hydration, meal reminders, and weekly recaps - Awards and streaks to celebrate progress without pressure - Offline-first experience - Privacy-focused design - Apple Watch companion app ATOMIC+ SUBSCRIPTION The free version is the real product — fasting tracking, manual food logging, readiness score, daily insights, themes, and 7 AI meal scans per week, all free and ad-free. Atomic+ unlocks: - Unlimited AI meal scans - iCloud backup and data export Available as Atomic+ Monthly, Atomic+ Annual (with 7-day free trial), or Atomic+ Lifetime. Terms of Use: https://atomicfast.com/terms Privacy Policy: https://atomicfast.com/privacy

Events

MAJOR UPDATE
Cloud Backup & Sync

Back up fasting sessions, meals, nutrition data, and food photos with iCloud. Restore on any device with one tap.

Ratings & Reviews

5.0

out of 5

24 Ratings

An absolute game-changer!
May 21

Azim Sabbir
I used to bounce between a fasting timer and a separate calorie tracker, but AtomicFast combines both perfectly. Being able to just snap a photo of my meal and have the AI instantly estimate macros has completely cured my tracking fatigue. The "Break-Fast Score" has also genuinely helped me stop crashing by guiding me to better choices right after a fast. Seeing my metabolic phases in real-time keeps me incredibly motivated, and I love that the insights are private and on-device. It's beautiful, ad-free, and highly effective!

Developer Response
Thank you for the amazing feedback! That’s exactly why we built Atomic Fast: to combine a fasting timer, AI meal scan, macro tracker, and calorie counter in one simple app. Glad the Break-Fast Score is helping you make better post-fast choices.
An absolute game-changer!
May 21

Azim Sabbir

I used to bounce between a fasting timer and a separate calorie tracker, but AtomicFast combines both perfectly. Being able to just snap a photo of my meal and have the AI instantly estimate macros has completely cured my tracking fatigue. The "Break-Fast Score" has also genuinely helped me stop crashing by guiding me to better choices right after a fast. Seeing my metabolic phases in real-time keeps me incredibly motivated, and I love that the insights are private and on-device. It's beautiful, ad-free, and highly effective!
Developer Response May 23
Thank you for the amazing feedback! That’s exactly why we built Atomic Fast: to combine a fasting timer, AI meal scan, macro tracker, and calorie counter in one simple app. Glad the Break-Fast Score is helping you make better post-fast choices.
Your wellness coach is here!
May 21

tulonaaaaa
Atomic Fast a lot at first, but once you get it, it basically runs your healthy life while you pretend you planned it all.AtomicFast isn’t just a fasting timer, it’s a full wellness system that connects fasting, nutrition, hydration, sleep, and health insights in one place. The AI tracking makes logging effortless with photo, voice, or scan options. The Break-Fast Score is a smart touch that helps avoid overdoing it after a fast.You can snap your food instead of typing “1 egg, half regret, full hunger” and it still understands you. Kind of impressive. Fasting timer shows “metabolic phases,” which sounds fancy enough to make you feel like a science experiment instead of just skipping dinner.Finally an app you can use for healthy lifestyle choices. Recommend it💯

Developer Response
Thank you for this amazing review.We love that you noticed Atomic Fast is not just a simple fasting timer. The goal has always been to bring fasting, meals, hydration, sleep, AI food tracking, and health insights together in a way that feels useful, not overwhelming.Also, “1 egg, half regret, full hunger” might be the most accurate food log ever 😂 That’s exactly why we added photo, scan, and simple "turn your messy description into proper nutrition breakdown" options, so tracking calories and macros feels easier and less like homework.Really glad the Break-Fast Score stood out too. What you eat after a fast matters, and we want Atomic Fast to help people build healthier habits without making it complicated.Thanks again for the thoughtful review and recommendation. It means a lot. 💯
Your wellness coach is here!
May 21

tulonaaaaa

Atomic Fast a lot at first, but once you get it, it basically runs your healthy life while you pretend you planned it all.AtomicFast isn’t just a fasting timer, it’s a full wellness system that connects fasting, nutrition, hydration, sleep, and health insights in one place. The AI tracking makes logging effortless with photo, voice, or scan options. The Break-Fast Score is a smart touch that helps avoid overdoing it after a fast.You can snap your food instead of typing “1 egg, half regret, full hunger” and it still understands you. Kind of impressive. Fasting timer shows “metabolic phases,” which sounds fancy enough to make you feel like a science experiment instead of just skipping dinner.Finally an app you can use for healthy lifestyle choices. Recommend it💯
Developer Response May 23
Thank you for this amazing review.We love that you noticed Atomic Fast is not just a simple fasting timer. The goal has always been to bring fasting, meals, hydration, sleep, AI food tracking, and health insights together in a way that feels useful, not overwhelming.Also, “1 egg, half regret, full hunger” might be the most accurate food log ever 😂 That’s exactly why we added photo, scan, and simple "turn your messy description into proper nutrition breakdown" options, so tracking calories and macros feels easier and less like homework.Really glad the Break-Fast Score stood out too. What you eat after a fast matters, and we want Atomic Fast to help people build healthier habits without making it complicated.Thanks again for the thoughtful review and recommendation. It means a lot. 💯
Perfect daily companion for fasting, meals, and hydration
May 14

jnahian
Atomic Fast has become part of my daily routine for tracking fasting, logging meals, and keeping hydration on track. I especially like the fasting timer, AI food scanning, calorie/macro tracking, and helpful reminders. The widgets and Live Activity support make it easy to check progress without constantly opening the app. Clean, practical, and genuinely useful for staying consistent.

Developer Response
Thank you so much for the thoughtful feedback. Really glad Atomic Fast is becoming part of your daily routine and helping you stay consistent with fasting, meals, and hydration.
Perfect daily companion for fasting, meals, and hydration
May 14

jnahian

Atomic Fast has become part of my daily routine for tracking fasting, logging meals, and keeping hydration on track. I especially like the fasting timer, AI food scanning, calorie/macro tracking, and helpful reminders. The widgets and Live Activity support make it easy to check progress without constantly opening the app. Clean, practical, and genuinely useful for staying consistent.
Developer Response May 15
Thank you so much for the thoughtful feedback. Really glad Atomic Fast is becoming part of your daily routine and helping you stay consistent with fasting, meals, and hydration.
Atomic Fast has been a great app for keeping my fasting routine consistent.
May 26

Sinclair@567
The interface is clean, the fasting timer is easy to manage, and the meal tracking features are surprisingly useful. I also like the hydration reminders and simple progress visuals. Everything feels smooth and well organized without being overwhelming.

Developer Response
Thank you so much! We’re really glad Atomic Fast is helping with your fasting routine. We designed the fasting timer, meal tracking, hydration reminders, and progress visuals to make intermittent fasting and healthy habit tracking feel simple, smooth, and easy to follow.
Atomic Fast has been a great app for keeping my fasting routine consistent.
May 26

Sinclair@567

The interface is clean, the fasting timer is easy to manage, and the meal tracking features are surprisingly useful. I also like the hydration reminders and simple progress visuals. Everything feels smooth and well organized without being overwhelming.
Developer Response May 28
Thank you so much! We’re really glad Atomic Fast is helping with your fasting routine. We designed the fasting timer, meal tracking, hydration reminders, and progress visuals to make intermittent fasting and healthy habit tracking feel simple, smooth, and easy to follow.

• Fixed an issue that could cause a brief hang when opening the app • Fixed navigation delay when browsing meal history • Sour cream, ginger ale, and seltzer are no longer incorrectly flagged as alcohol • Improved input validation during onboarding — display name, date of birth, and target weight now have proper safety guardrails • Profile name edits are now validated consistently • Stability improvements and bug fixes

Version 1.1.2 May 27

Data Linked to You

The following data may be collected and linked to your identity:
- Contact Info
- Identifiers
Data Not Linked to You

The following data may be collected but it is not linked to your identity:
- User Content

Privacy practices may vary, for example, based on the features you use or your age. Learn More

Accessibility

Information

Seller: Startise Limited
Size: 17 MB
Category: Health & Fitness
Compatibility: Requires iOS 18.0 or later.

iPhone
Requires iOS 18.0 or later.

iPad
Requires iPadOS 18.0 or later.

Mac
Requires macOS 15.0 or later and a Mac with Apple M1 chip or later.

Apple Vision
Requires visionOS 2.0 or later.

Apple Watch
Requires watchOS 10.0 or later.
Languages: English
Age Rating: 9+

9+

Learn More

Contains
Health or Wellness Topics
In-App Purchases: Yes

Atomic+ Annual $29.99

Atomic+ Lifetime $59.99

Atomic+ Monthly $4.99

Learn More

Developer Website

Privacy Policy

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Events

Cloud Backup & Sync

Ratings & Reviews

An absolute game-changer!

Your wellness coach is here!

Perfect daily companion for fasting, meals, and hydration

Atomic Fast has been a great app for keeping my fasting routine consistent.

What’s New

App Privacy

Data Linked to You

Data Not Linked to You

Accessibility

Information

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