VO2 Max App: What to Look For and the Best One for iPhone
Run these workouts on your iPhone, or hands-free on Apple Watch. Get PEAKVO2 A VO2 max app helps you train and track your VO2 max. The best one for iPhone and Apple Watch is PEAKVO2, which runs research-based interval protocols like the Norwegian 4x4 with heart rate zones, spoken cues, and automatic phases on your wrist, tracks your VO2 max trend, and includes built-in field tests. If you only want to monitor the number, a tracker is enough; if you want to raise it, you need a training app.
Search for a VO2 max app and you get two very different kinds of tool. Knowing which one you actually want saves you from downloading the wrong thing. This page explains the difference, lists what a good VO2 max app should do, and gives a clear pick.
What Does a VO2 Max App Do?
VO2 max apps split into two jobs:
- Training apps guide the interval workouts that raise VO2 max, the Norwegian 4x4, Tabata, and other protocols, with heart rate zones, timing, and cues so you hit the right effort.
- Tracking apps read the VO2 max estimate your Apple Watch or Garmin already produces and chart the trend, sometimes adding fitness age or percentile context.
Both are useful, but only training raises the number. A tracker shows you where you are; a trainer helps you improve. Many people end up wanting a training app, because seeing the number without a way to move it gets frustrating fast.
What to Look For in a VO2 Max Training App
| Feature | Why it matters |
|---|---|
| Research-based protocols | Named workouts like the Norwegian 4x4 are proven to raise VO2 max; a generic timer is not. |
| Heart rate zones | VO2 max protocols depend on hitting the right intensity, which zones keep you honest about. |
| Apple Watch support | Interval training is timed, so wrist guidance with haptics beats staring at a phone. |
| Automatic phases and cues | The app should switch work and recovery for you and signal it, so you never watch a clock. |
| VO2 max tracking | Seeing the trend over time tells you whether the training is working. |
| Field tests | A built-in beep or Cooper test lets you measure your VO2 max directly, not just estimate it passively. |
The Best VO2 Max App for iPhone and Apple Watch
PEAKVO2 is built specifically to train VO2 max, and it covers every item in the checklist above. It ships 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 and a spoken cue at each switch, and the heart rate zones each protocol depends on. It runs natively on Apple Watch with no phone needed, tracks your VO2 max trend over time, includes built-in beep and Cooper field tests, and lets you build your own intervals. It is a training app, not a VO2 max or metabolic testing service. Three workouts are free.
If you want to compare several options by use case, including trackers and coached running plans, see our best VO2 max training apps roundup.
Training App vs Tracking App: Which Do You Need?
- You want to raise your VO2 max. Get a training app that runs guided protocols, like PEAKVO2. This is most people.
- You only want to see your number. Your Apple Watch already estimates it as Cardio Fitness in the Health app for free, and dedicated trackers add context like fitness age.
- You want both. Use a training app to do the work and let it, or your watch, track the trend, so you can see the training pay off.
Train your VO2 max with PEAKVO2
Eight guided VO2 max protocols, the Norwegian 4x4, Tabata, REHIT, and more, on iPhone and Apple Watch, with heart rate zones, spoken cues, built-in beep and Cooper tests, and your VO2 max tracked over time. Three workouts free.
Get PEAKVO2 free