Comparison

Atomic Fast vs Vitra

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

Atomic Fast

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.

Highlights
  • 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
Features
Read full description

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

About

Vitra

This AI-powered health companion helps you easily track calories, macros, and micronutrients. It offers instant meal scanning via camera, a vast food database, and personalized daily nutrition insights to support your health goals.

Highlights
  • AI Meal Scanner
  • Extensive Food Search
  • Personalized AI Insights
  • Bloodwork & Weight Tracking
  • Custom Macro/Calorie Targets
  • Daily Health Score
  • Habit Tracking
Features
Read full description

Vitra is your all-in-one health and nutrition companion, powered by AI. Track calories, macros, and micronutrients with ease. Scan meals instantly using your camera, search millions of foods and restaurant menu items, and get personalised AI-generated insights about your nutrition every day. FEATURES: • AI Meal Scanner — photograph any meal and instantly get a full nutrition breakdown • Food Search — search millions of foods including McDonald's, Chipotle, and more • Daily & Weekly AI Insights — personalised recommendations based on your actual data • Bloodwork Tracking — log and monitor your lab results over time • Macro & Calorie Targets — set custom goals with preset macro ratios or manual input • Weight Tracking — log your weight and visualise your progress • Daily Health Score — see how your nutrition stacks up each day • Habit Tracking — build and maintain healthy habits • Vitra Pro — unlock all features with a monthly or yearly subscription Whether you're focused on weight loss, muscle gain, or simply eating better, Vitra gives you the tools and intelligence to make it happen. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://myvitra.org/privacy

Screenshots

Atomic Fast4 screens
Vitra4 screens

Verdict

The call

The clearest difference is ratings volume: Atomic Fast at 31 against Vitra's 6. Atomic Fast also leads on device support (3 vs 1). On price, rating, review sentiment and update cadence there is nothing between them.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Atomic Fast sells 3 in-app purchases, starting at $4.99 per month and Vitra sells 2 in-app purchases, starting at $9.99 per month. Whichever you choose, the download price is not the number that matters.

ReceptionRating · Positive reviews · Number of ratings

On the App Store both sit at effectively the same score — 5.0 for Atomic Fast against 5.0 for Vitra. That said, the two scores are not equally well evidenced: Atomic Fast has 31 ratings behind it against 6, so its average is the more settled of the two. Written reviews are what separate them: 96% of Atomic Fast's written reviews are positive against 100% of Vitra's.

UpkeepUpdate frequency

Atomic Fast ships an update every 4 days, Vitra every 5 days. The most recent releases landed on November 5, 2026 and October 31, 2026 respectively.

Scorecard2 real differences · 8 level
Atomic Fast versus Vitra: the parameters behind the verdict, then further details
ParameterAtomic FastVitra
PriceFreeFree
Rating5.0 (31 ratings)5.0 (6 ratings)
Positive reviews96.3% of reviews100.0% of reviews — better
Number of ratings31 — better6
Update frequencyEvery 4 days — betterEvery 5 days
AdsNoNo
In-app purchasesYesYes
MonetizationFreemiumFreemium
DevicesiPhone, iPad, Apple Watch — betteriPhone
Requires iOS18.017.0 — better
Further details — not scored
Size22 MB7 MB
Age rating4+4+
DeveloperStartiseVelora Technologies LLC

Customer experience

Atomic Fast

All ratings28 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews27 reviews
Positive96.3%
Neutral3.7%
Negative0.0%

Vitra

All ratings6 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews4 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

3 purchases

Atomic Fast

Subscriptions2
  • Atomic+ Monthly$4.991 Month
  • Atomic+ Annual7 Days trial$29.991 Year
One-time1
  • Atomic+ Lifetime$59.99
2 purchases

Vitra

Subscriptions2
  • Vitra Pro Monthly7 Days trial$9.991 Month
  • Vitra Pro Annual Subscription$89.991 Year

Questions

Is Atomic Fast free?
Atomic Fast is free to download, with in-app purchases available.
Is Vitra free?
Vitra is free to download, with in-app purchases available.
Which has better reviews, Atomic Fast or Vitra?
Atomic Fast and Vitra are both rated 5.0 out of 5 on the App Store, from 31 and 6 ratings respectively.
Do Atomic Fast or Vitra have ads?
Neither Atomic Fast nor Vitra shows ads.
Which is updated more often, Atomic Fast or Vitra?
Atomic Fast ships an update every 4 days, and Vitra every 5 days. Most recently, Atomic Fast was updated on November 5, 2026 and Vitra on October 31, 2026.

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