Comparison

VO2 Max Trainer vs Morphy

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

Head to head
About

VO2 Max Trainer

Measure, track, and improve your VO2 Max with a variety of fitness tests and personalized training plans. Features include HIIT and Zone 2 workouts, progress tracking, and integration with Apple Watch and HealthKit.

Highlights
  • Measure VO2 Max with 5 fitness tests
  • HIIT and Zone 2 training
  • Track progress and compare to leaderboards
  • Apple Watch integration
  • HealthKit integration
  • Training readiness scoring
  • Fitness age calculation
Features
Read full description

Boost your VO2 max, one of the strongest predictors of endurance performance and of how long and how well you live. Measure your true VO2 max in 15 minutes or less, raise it with Zone 2 and HIIT workouts, and beat the rest of the world on a verified global leaderboard. iPhone and Apple Watch. NEW: GHOST RACE Race a ghost during your Cooper test, Balke test or 1.5 mile (2.4 km) run. Pick your best run, your 12-week goal, the athlete 10 places above you on the leaderboard, the #1 of your age group, an Olympic record, or any VO2 max you choose. The gap shows live in meters or yards, green when you lead and orange when you chase, with voice cues when you pass or get passed. Follow the race on the Lock Screen, in the Dynamic Island and on your Apple Watch, even without your iPhone. The result saves as a normal test, and you can share a "Me vs ghost" card. MEASURE YOUR VO2 MAX - Beep test 20 m and 15 m (bleep test, PACER test, multistage fitness test, Leger shuttle run) - Yo-Yo Intermittent Recovery test, levels 1 and 2 (YYIR1, YYIR2) - Cooper test (12-minute run) - Balke test (15-minute run) - 1.5 mile / 2.4 km run test Results are compared with age and sex norms. FIND YOUR TRUE MAX HEART RATE AND LACTATE THRESHOLD The 220 minus age formula can be off by 10 to 20 beats per minute. Run a beep test with a heart rate monitor and the app records your real maximum heart rate and estimates your lactate threshold from how your heart rate responds as the pace rises, with no lab and no blood test. Your Zone 2 and HIIT zones are then built from your own threshold. TRAIN TO IMPROVE IT - Zone 2 training with personal heart rate limits and Apple Watch haptics when you drift out of zone - HIIT and interval workouts: Norwegian 4x4, Tabata, Gibala, 30/30, EMOM, Myoreps - Free mode to log any session - Custom workout builder: work, rest, repeat blocks, warm-up and cool-down - A 12-week training plan built from your current fitness level - An AI coach on the Plan tab that tells you what to do today and why GLOBAL LEADERBOARD WITH VERIFIED RESULTS Compare your VO2 max with athletes worldwide by age, sex, country and job. A score only reaches the leaderboard after anti-cheat checks: GPS, heart rate (Apple Watch or a chest strap), cadence and vehicle detection. Verification badges show how each result was checked. O2 POINTS AND RANKS VO2 max moves slowly, so O2 Points show the work you put in every day. Every minute with heart rate earns points, harder zones earn more, and 80/20 training, following your plan and retesting give boosts. Climb 7 ranks, from Reserve Duty to Norwegian Cyborg. LIVE ACTIVITIES AND WIDGETS Every test, Zone 2 session and interval workout shows on the Lock Screen and in the Dynamic Island: level, time, heart rate and zone without unlocking. Home Screen and Lock Screen widgets show your next workout, readiness, fitness age, VO2 max progress, Zone 2 minutes, O2 rank and leaderboard position. KNOW YOUR BODY - Training readiness score (1 to 100) from HRV, resting heart rate, sleep and recent load - Fitness age, from your VO2 max and other health markers - Race time predictions from 5K to marathon - Post-workout analysis: effort score, time in each zone, pace, intervals - Editable history with monthly and yearly charts APPLE WATCH AND HEALTH Leave the phone at home: tests, Zone 2 and intervals run on the watch with haptics and audio. Workouts sync with Apple Health, and workouts from other apps can be imported. WHO IT'S FOR Athletes and runners who want to go faster for longer. Soccer, rugby, basketball and hockey players. People preparing for military, police or firefighter fitness tests, PE teachers, students and coaches. And anyone who wants a stronger heart and lungs, a younger fitness age and more healthy years. Built by one independent developer. Questions? Message me in the app. Terms of use (Apple standard EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

About

Morphy

Features
Read full description

I wore my Apple Watch for years without really using what it was telling me. The data was there - precise, reliable - but never explained, never put into context. As a coach and athlete, I knew this data had value, but it wasn’t actionable. So instead of switching to another watch, I built Morphy. To understand my recovery, manage my training, and perform at my best. KEY FEATURES BodyLevel – your daily condition in a single score combining sleep, heart data, training, and activity Body Battery – your real energy level, based on heart recovery and variability Training Load Management – compare your current load to your usual level and balance stress vs fitness Effort Zones Breakdown – are you training at the right intensity? Estimated VO2 Max Speed (VMA) – calculated from your workouts Target Paces – know how fast to run to improve based on your current level Race Predictions – estimated finish times for official races Sleep Debt – how much you’ve actually recovered this week And more… CONFIDENTIALITY All your data stays on your device. No account. No cloud. No external AI. Morphy reads your Apple Health data locally - it never leaves your iPhone. LEGAL Morphy uses Apple Health (HealthKit) data. This app is not a medical device and does not replace professional medical advice. TERMS OF USE https://octopy.notion.site/Terms-of-Use-Morphy-342ac123fe9e80c59a96e03d50ec5e83?pvs=141 PRIVACY POLICY https://octopy.notion.site/Privacy-Policy-348ac123fe9e8003b2d9c20423d5cbb6?source=copy_link

Screenshots

VO2 Max Trainer4 screens
Morphy4 screens

Verdict

The call

The clearest difference is device support: VO2 Max Trainer at 3 against Morphy's 1. VO2 Max Trainer also leads on iOS requirement (18.6 vs 26.2). On price, update cadence, ads and in-app purchases 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. VO2 Max Trainer sells 7 in-app purchases, starting at $1.99 per 7 days and Morphy sells 2 in-app purchases, starting at $2.99 per month. Whichever you choose, the download price is not the number that matters.

UpkeepUpdate frequency

VO2 Max Trainer ships an update weekly, Morphy every 2 weeks. The most recent releases landed on October 15, 2026 and October 11, 2026 respectively.

Scorecard2 real differences · 8 level
VO2 Max Trainer versus Morphy: the parameters behind the verdict, then further details
ParameterVO2 Max TrainerMorphy
PriceFreeFree
Rating4.0 (4 ratings) — better—
Positive reviews0.0% of reviews—
Number of ratings4 — better—
Update frequencyWeekly — betterEvery 2 weeks
AdsNoNo
In-app purchasesYesYes
MonetizationFree with in-app purchases—
DevicesiPhone, iPad, Apple Watch — betteriPhone
Requires iOS18.6 — better26.2
Further details — not scored
Size286 MB15 MB
Age rating4+4+
DeveloperKevin FlochSweaty Studio

In-app purchases

7 purchases

VO2 Max Trainer

Subscriptions3
  • VO2_Weekly3 Days trial$1.997 Days
  • VO2_Monthly7 Days trial$1.991 Month
  • VO2_Annually7 Days trial$14.991 Year
One-time4
  • VO2_Lifetime_Upgrade$9.99
  • VO2_Lifetime_Upgrade2$14.99
  • VO2_Lifetime$19.99
Show 1 more
  • VO2_Lifetime2$29.99
2 purchases

Morphy

Subscriptions1
  • Morphy Pro Monthly7 Days trial$2.991 Month
One-time1
  • Morphy Pro$8.99

Questions

Is VO2 Max Trainer free?
VO2 Max Trainer is free to download, with in-app purchases available.
Is Morphy free?
Morphy is free to download, with in-app purchases available.
Do VO2 Max Trainer or Morphy have ads?
Neither VO2 Max Trainer nor Morphy shows ads.
Which is updated more often, VO2 Max Trainer or Morphy?
VO2 Max Trainer ships an update weekly, and Morphy every 2 weeks. Most recently, VO2 Max Trainer was updated on October 15, 2026 and Morphy on October 11, 2026.

Other comparisons