PEAKVO2 vs True VO2 Max: Measure It or Train It?
Run these workouts on your iPhone, or hands-free on Apple Watch. Get PEAKVO2 True VO2 Max and PEAKVO2 approach VO2 max from different ends. True VO2 Max is built around an accurate number, with indoor treadmill estimates, weather and elevation corrections, and guided treadmill runs. PEAKVO2 is built around training, running guided VO2 max interval protocols on your wrist across any activity, with built-in field tests. Pick True VO2 Max to measure the number precisely; pick PEAKVO2 to train it with structured intervals.
Both are strong VO2 max apps, so this is not about which is better overall. It is about their centers of gravity: one is a measurement specialist that also guides treadmill runs, the other is an interval training specialist that also tracks and tests your number. That difference decides which fits you.
PEAKVO2 vs True VO2 Max at a Glance
| PEAKVO2 | True VO2 Max | |
|---|---|---|
| Headline strength | Guided VO2 max interval protocols | Lab-like VO2 max measurement |
| Weather and elevation correction | No | Yes, research-based corrections |
| Indoor treadmill VO2 max | Not the focus | Yes, a core feature |
| Guided workouts | Eight interval protocols, any activity | Treadmill runs, easy to interval to long |
| Named VO2 max protocols | Norwegian 4x4, Tabata, HIIT 30/30, and more | Not the focus |
| Field tests | Built-in beep and Cooper tests | No, measures from runs |
| Run analytics | Not the focus | Splits, maps, elevation, pace charts |
| Apple Watch | Runs protocols on the wrist | Required, measures from watch data |
| Price | 3 workouts free, then $0.99/mo, $9.99/yr, $19.99 lifetime | Free, then $5.99/mo or $59.99/yr |
What True VO2 Max Is
True VO2 Max is a cardio fitness app built to give you an accurate VO2 max number from your Apple Watch. Its standout features are a first-of-its-kind indoor treadmill VO2 max, so your fitness still registers on indoor runs, and research-based weather and elevation corrections, which strip out the misleading dips that heat, humidity, altitude, and smog cause in outdoor estimates, with transparent per-condition impact. It also delivers detailed post-run breakdowns, heart rate, heart rate recovery, splits, a route map, elevation and pace charts, and it offers guided treadmill runs with voice coaching. It requires no account and shows no ads. Its focus is trustworthy measurement for runners.
What PEAKVO2 Is
PEAKVO2 is an interval training app for iPhone and Apple Watch, built around raising VO2 max. It runs eight validated protocols, the Norwegian 4x4, Tabata, HIIT 30/30, Billat 30/30, Ronnestad 30/15, VO2 Max 3x3, VO2 Max 5x3, and Tempo Run, with full-screen color-coded phases, automatic transitions, a haptic tap at each switch, and heart rate zones, and it works across any activity, not just running. It runs natively on Apple Watch with no phone needed, needs no external account, tracks your VO2 max trend over time, and includes built-in beep and Cooper field tests so you can measure your VO2 max directly. It is a training app, not a testing service.
The Core Difference: An Accurate Number vs Structured Training
True VO2 Max is at its best answering "what is my VO2 max, really?" It works hard to make that number trustworthy across indoor runs and bad weather, which is genuinely useful and beyond what a training app does. But its workouts are treadmill runs, so if you want structured interval protocols across cycling, rowing, or bodyweight, that is not its focus.
PEAKVO2 is at its best answering "run the VO2 max session that raises my fitness." It ships the specific named protocols proven to lift VO2 max, guides each phase on your wrist, works for any activity, and lets you test your VO2 max directly with beep and Cooper tests. It does not weather-correct a passive estimate; it gives you the training and a direct test instead. If you want the most accurate passive number, especially indoors, True VO2 Max specializes in it. If you want guided interval training across activities, that is PEAKVO2. For a pure tracker with fitness age and benchmarks, see our PEAKVO2 vs VO2 Max Pro comparison.
Who Each One Is For
- Choose True VO2 Max if your priority is an accurate, weather-corrected VO2 max number, you run indoors on a treadmill or in variable conditions, and you want detailed run analytics with your measurement.
- Choose PEAKVO2 if your priority is running guided VO2 max interval protocols on your wrist across running, cycling, rowing, or bodyweight, with built-in beep and Cooper tests to check progress.
- Use both to close the loop: PEAKVO2 to train the intervals, True VO2 Max to keep the most accurate read on the number, indoors and out.
Build your aerobic engine with PEAKVO2
Guided VO2 max protocols, the Norwegian 4x4, Tabata, REHIT, and more, on iPhone and Apple Watch, with heart rate zones, built-in beep and Cooper tests, and your VO2 max tracked over time. Three workouts free.
Get PEAKVO2 free