Comparison

Morpheus Training vs Carbon

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

Head to head
About

Morpheus Training

This app optimizes cardio training and recovery by providing personalized heart rate zones and weekly targets. It uses HRV data to guide intensity and volume, helping users improve fitness and conditioning with zone-based interval training.

Highlights
  • Personalized heart rate zones
  • CardioSmart features
  • Zone-based interval training (ZBIT)
  • Weekly heart rate zone targets
  • Daily recovery score
  • Integrates with wearables and Apple Health Kit
Read full description

Personalized Cardio Made Simple. Morpheus is the only system that gives you truly personalized cardio — dynamic heart rate zones, daily recovery scores, and weekly training targets that adapt to your body every single day. No more guessing how hard to train, which zone you should be in, or how much cardio you need each week. Your Recovery. Your Zones. Your Targets. When paired with the Morpheus M7 heart rate monitor, Morpheus measures your HRV and resting heart rate each morning to calculate your daily recovery score. From there, it sets personalized heart rate zones and weekly targets matched to your fitness level, your goal, and how your body is responding to training. Unlike other apps that give everyone the same fixed zones based on percentages of max heart rate, Morpheus zones are anchored to your real physiological thresholds — the points at which your body shifts how it produces and uses energy. And because those thresholds change daily with your recovery, your zones adjust too. This is especially important for training in your Zone 2 — the most talked about training zone in endurance and longevity research. Zone 2 is most effective when you're training at the right intensity for your individual physiology. Too easy and you're leaving progress on the table. Too hard and you're no longer in Zone 2 at all. Because Morpheus personalizes your Zone 2 range to your actual aerobic threshold — and adjusts it daily based on your recovery — you can be confident you're always training in the zone that delivers the most benefit, not just a static percentage of max heart rate that often misses the mark. Please note: The Morpheus M7 heart rate monitor is required to unlock HRV measurement, recovery scoring, and personalized heart rate zones and targets. Build Your VO2 Max. Improve Your Health. Live Longer. VO2 max — your body's ability to use oxygen during exercise — is one of the strongest predictors of long term health and longevity. Research consistently shows that people with higher VO2 max live longer, healthier lives with a significantly lower risk of cardiovascular disease. Morpheus is built around the training principles that drive VO2 max improvement most effectively. After analyzing data from more than 500,000 workouts and 1 million days of use, Morpheus has learned exactly how much time in each of its three heart rate zones drives the fastest improvements in aerobic fitness and conditioning. Each week it sets a personalized target range for your low, moderate, and high intensity training — so you always know you’re giving your body what it needs and can recover from. Meet your targets consistently and watch your VO2 max and fitness improve. The Morpheus Methods - Train with Purpose Morpheus gives you 12 guided training methods to choose from, each designed to target a specific zone and training purpose — so you can get the most out of every workout. Whether you're focused on building your aerobic base with sustained low intensity work, developing your conditioning for a sport, or pushing your peak fitness with high intensity efforts, there's a method designed for exactly that. Each method gives you a clear structure with your heart rate guiding every phase. No guesswork, no confusion. Just targeted training that’s designed for your body so you can get the most out of every workout.

About

Carbon

This app provides personalized nutrition plans for weight loss, muscle gain, or maintenance. It adapts your plan as you progress and offers a comprehensive food tracker with a large database and barcode scanner. It supports various diet preferences and allows for custom meal planning.

Highlights
  • Personalized nutrition plans
  • Adaptive plan adjustments
  • Comprehensive food logging
  • Barcode scanner
  • Diet preference customization
  • Diet planner for flexible eating
Features
Read full description

Carbon Diet Coach is your nutrition solution for results that LAST. Whether your goal is to lose fat, build muscle, improve your metabolism, or simply maintain your weight, Carbon Diet Coach removes the guesswork. Carbon Diet Coach is a science-based nutrition app designed by renowned nutrition coaches Dr. Layne Norton (Ph.D. Nutritional Sciences) and Registered Dietitian Keith Kraker (BS Dietetics). It does everything a normal nutrition coach would but at a fraction of the cost. Simply select your goal, answer a few short questions, and it does the rest! You will get a customized nutrition plan based on YOUR goals and metabolism. What's more, Carbon will adjust the plan as you progress to optimize your results. If you hit a plateau or stall, Carbon will make adjustments to keep you progressing towards your goal, just like any good coach would. Our coaching system uses the latest techniques in nutrition science to make sure you get the best results possible. All you need to do is follow these simple steps: ∙ Log your food using the built-in food tracker ∙ Log your body weight ∙ Check-in each week Do that and Carbon does the rest! Carbon Diet Coach can do things other nutrition coaching apps can’t do. For example, your nutrition plan can be tailored to your diet preference: ∙ Balanced ∙ Low Carb ∙ Low Fat ∙ Ketogenic ∙ Plant-Based Each setting is completely customizable so that you receive a plan that is sustainable for YOU! Another feature that makes Carbon unique is the diet planner. Want high and low-calorie days rather than eating the same foods every day? Use the diet planner to set up your week and stay on track. Overate on one day and not sure what to do with your nutrition plan for the rest of the week? Adjust the diet planner to account for what you overate and Carbon does the rest! Other coaching features include: ∙ Adjustable check-in days ∙ Check-in explanations so you're never left wondering why the app did or didn’t make a change ∙ Check-in history so you can look back and see why the app made various adjustments ∙ Charts showing your weight, body fat, lean body mass, calorie intake, protein intake, carbohydrate intake, fat intake, and metabolic rate ∙ Early check-in feature for those who can’t always check in on their specified day ∙ Goal tracker so you can see the progress you’ve made and how close you are to your goal ∙ Recommendations after you reach a goal so you can plan for what's next and KEEP your results ∙ Integrates with Apple Health to automatically read Body Weight and Body Fat values Already know what you are doing with nutrition and don’t need Carbon to coach you? No problem, you can enter your nutrition targets and simply use the food tracker. Beyond the amazing coaching features of this app is a food tracker that's excellent in its own right. Its features include: ∙ A huge food database ∙ Barcode scanner ∙ Quick add macros ∙ Copy meals ∙ Favorite foods ∙ Create custom foods ∙ Create custom recipes No matter what your goal is, Carbon Diet Coach is your solution. Simple. Scientific. Sustainable. App Subscriptions: ∙ Monthly ∙ 6 Months ∙ Yearly The subscription period will automatically renew unless auto-renew is turned off at least 24 hours before the end of the current subscription period. To turn this function off, simply go to your iTunes account and turn off auto-renew. Renewal payments will differ depending on subscription and pricing at the time of renewal. Your iTunes account will be charged when the purchase is confirmed. Food database powered by FatSecret: https://fatsecret.com Terms and Conditions: https://joincarbon.com/terms-and-conditions/ Privacy Policy: https://joincarbon.com/privacy-policy/

Screenshots

Morpheus Training4 screens
Carbon4 screens

Verdict

The call

The clearest difference is in-app purchases: Morpheus Training at none against Carbon's 9. Morpheus Training also leads on device support (3 vs 1). Carbon's advantage is review sentiment (79% vs 58%) and chart position (#88 vs unranked). On price, rating, update cadence and ads 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. Carbon sells 9 in-app purchases, starting at $11.99 per month. Morpheus Training asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

On the App Store both sit at effectively the same score — 4.9 for Morpheus Training against 4.8 for Carbon. That said, the two scores are not equally well evidenced: Carbon has 8.1K ratings behind it against 899, so its average is the more settled of the two. Written reviews are what separate them: 58% of Morpheus Training's written reviews are positive against 79% of Carbon's.

UpkeepUpdate frequency

Morpheus Training ships an update every 11 days, Carbon weekly. The most recent releases landed on October 26, 2026 and October 27, 2026 respectively.

Scorecard5 real differences · 6 level
Morpheus Training versus Carbon: the parameters behind the verdict, then further details
ParameterMorpheus TrainingCarbon
PriceFreeFree
Rating4.9 (899 ratings) — better4.8 (8.1K ratings)
Positive reviews58.4% of reviews79.2% of reviews — better
Number of ratings8998.1K — better
Update frequencyEvery 11 daysWeekly — better
AdsNoNo
In-app purchasesNo — betterYes
MonetizationFree with in-app purchasesFree with in-app purchases
Best chart rank—#88 — better
DevicesiPhone, iPad, iPod — betteriPhone
Requires iOS15.1 — better16.6
Further details — not scored
Size71 MB106 MB
Age rating4+17+
DeveloperMorpheus Labs INCReform LLC

Customer experience

Morpheus Training

All ratings630 ratings
Positive98.7%
Neutral0.3%
Negative1.0%
Written reviews113 reviews
Positive58.4%
Neutral12.4%
Negative29.2%

Carbon

All ratings8,002 ratings
Positive95.9%
Neutral1.4%
Negative2.6%
Written reviews447 reviews
Positive79.2%
Neutral6.5%
Negative14.3%

Bugs and requests

Morpheus Training

Not enough reviews yet to summarise bugs or requests.

Carbon

Reported bugs

2 issues
  • Occasional app crashes or freezes
  • Issues with resetting account data

Requested features

4 requests
  • Add water intake tracking
  • Improve barcode scanning functionality
  • Allow more flexibility in macro adjustments
  • Integrate with fitness trackers

In-app purchases

None

Morpheus Training

No in-app purchases

9 purchases

Carbon

Subscriptions9
  • Monthly Subscription$11.991 Month
  • Monthly Subscription7 Days trial$11.991 Month
  • Monthly Subscription14 Days trial$11.991 Month
Show 6 more
  • Six Month Subscription$59.996 Months
  • Six Month Subscription7 Days trial$59.996 Months
  • Six Month Subscription14 Days trial$59.996 Months
  • Yearly Subscription$99.991 Year
  • Yearly Subscription7 Days trial$99.991 Year
  • Yearly Subscription14 Days trial$99.991 Year

Questions

Is Morpheus Training free?
Morpheus Training is free to download, with no in-app purchases.
Is Carbon free?
Carbon is free to download, with in-app purchases available.
Which has better reviews, Morpheus Training or Carbon?
Morpheus Training is rated higher. Morpheus Training averages 4.9 out of 5 from 899 ratings, while Carbon averages 4.8 from 8.1K ratings.
Do Morpheus Training or Carbon have ads?
Neither Morpheus Training nor Carbon shows ads.
Which is updated more often, Morpheus Training or Carbon?
Morpheus Training ships an update every 11 days, and Carbon weekly. Most recently, Morpheus Training was updated on October 26, 2026 and Carbon on October 27, 2026.

Other comparisons