# Atomic Fast: Fasting & Diet — AI Calorie & Meal Tracker > Intermittent fasting and AI meal tracker with metabolic insights and Apple Health integration. (iPhone/iPad app by Startise.) - Source: https://appshunter.io/ios/app/atomic-fast-fasting-and-diet/id6763870543 (this page in markdown: same URL + `.md`) - Developer: [Startise](https://appshunter.io/developer/1895534080) - Category: Health & Fitness, Food & Drink - Price: Free with in-app purchases - Rating: 5.00/5 from 27 App Store ratings · 26 written reviews indexed - Age rating: 4+ - Requires: iOS 18.0 · 22 MB - Languages: American English, Danish, Dutch, French (France), German (Germany), Italian, Norwegian Bokmål, Brazilian Portuguese, Russian, European Spanish and 1 more - Released: 2026-05-06 - Data updated: 2026-08-23 - Monetization: freemium - User reviews in markdown: https://appshunter.io/ios/app/atomic-fast-fasting-and-diet/id6763870543/reviews.md ## What is Atomic Fast? Track your fasts through real metabolic phases, then snap a photo of your meal to log calories and macros in seconds — and see exactly how the two connect. Most fasting apps track time; most calorie apps track food. Atomic Fast connects both. Atomic Fast 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, ketosis, deeper fasting, and autophagy. 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. Atomic Fast 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. BREAK-FAST SCORE The first meal after a fast matters. Atomic Fast 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. Atomic Fast 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 Atomic Fast 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 Atomic Fast 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+ 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 ## Key features - 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 ## Pricing and in-app purchases Base price: Free. **Subscriptions** | Subscription | Price | Period | | --- | --- | --- | | Atomic+ Monthly | $4.99 | per month | | Atomic+ Annual | $29.99 | per year | **One-time purchases** | Purchase | Price | Type | | --- | --- | --- | | Atomic+ Lifetime | $59.99 | one-time | ## Recent user reviews (10 of 26) All indexed reviews: https://appshunter.io/ios/app/atomic-fast-fasting-and-diet/id6763870543/reviews.md ### 3/5 — Barcode scanner *2026-08-15, version 1.3.1* 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 ### 5/5 — Amazing *2026-07-10, version 1.1.2* Clean, easy to use and genuinely helpful. The fasting timer is great, and the AI meal logging makes tracking food much easier. ### 5/5 — Beautifully designed, super easy to stick with *2026-07-10, version 1.1.2* 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. ### 5/5 — Calorie logging feels effortless *2026-05-31, version 1.1.2* 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. ### 5/5 — Smooth meal and calorie tracking *2026-05-31, version 1.1.2* 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. ### 5/5 — Atomic Fast has been a great app for keeping my fasting routine consistent. *2026-05-26, version 1.1.1* 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. ### 5/5 — Amazing Fasting Tracker *2026-05-26, version 1.1.1* I’ve tried a few fasting apps before, but Atomic Fast feels much more polished and easier to stick with. The fasting tracker is straightforward, and I appreciate how it combines fasting, calories, meals, and hydration in one app. It’s simple enough for beginners but still useful for daily habit tracking. ### 5/5 — Simple and effective diet app *2026-05-25, version 1.1.1* This app has a very smooth and professional feel. Starting and ending fasts is simple, and the meal tracking features help me stay more mindful about what I eat. The fasting progress visuals are also really motivating. Overall, it feels reliable and thoughtfully diet designed. ### 5/5 — Really enjoying the experience so far. *2026-05-24, version 1.1.1* The design is modern, the fasting timer works perfectly, and the app makes it easy to stay aware of my eating habits throughout the day. I especially like how clean the dashboard looks and how quickly I can log meals and water intake. ### 5/5 — Atomic Fast makes intermittent *2026-05-24, version 1.1.1* fasting feel more manageable. The progress tracking is motivating, and the app doesn’t overload you with too many complicated features. I like that it focuses on building healthy routines while still keeping everything easy to understand and use. ## Frequently asked questions about Atomic Fast ### 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. ## Version history (last 5 releases) ### 1.3.1 — 2026-08-10 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. ### 1.3.0 — 2026-08-08 Now in 10 more languages Atomic Fast now speaks Danish, Dutch, French, German, Italian, Norwegian, Portuguese (Brazil), Russian, Spanish and Swedish — the app, your widgets and your notifications. Everything follows your phone's language by default. You can also pick a different language for the app in Settings, and it applies straight away. ### 1.2.3 — 2026-07-21 New: Share your fast You can now turn any fast — running or finished — into a clean image you can post anywhere. Look for the share icon beside your timer, or on your fast summary when you finish one. Also new: if you've logged a meal recently, starting a fast now offers to count from that meal instead of from the moment you tap Start. Plus a more dependable sign-in that recovers on its own if your session ever gets stuck. ### 1.2.2 — 2026-07-19 This update fixes an important sign-in issue. If your account ever gets stuck on a "Token refresh failed" error, the app now detects it and takes you safely back to the sign-in screen — sign in again with the same email and you're back, with your fasting history intact. ### 1.2.1 — 2026-07-16 This update is all about reliability. Your stats no longer briefly show zero after signing in, and your display name no longer disappears after email sign-in. Signing in with email now works dependably even if you've been away a while, and your fasting activity syncs more reliably when you switch away from the app. Plus a batch of under-the-hood improvements. ## More apps by Startise - [TripMath - Split Group Expense](https://appshunter.io/ios/app/tripmath-split-group-expense/id6784997565) All apps by Startise: https://appshunter.io/developer/1895534080 --- *Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-08-23.*