# Kaizen Studio vs VO2 Max Training

The clearest difference is in-app purchases: Kaizen Studio at none against VO2 Max Training's 6. Kaizen Studio also leads on iOS requirement (11.0.0 vs 18.0). VO2 Max Training's advantage is update cadence (every 4 days vs every 5 months). On price, ads and device support there is nothing between them.

Both are free to download. VO2 Max Training sells 6 in-app purchases, starting at $0.99 per month. Kaizen Studio asks for nothing beyond the download.

Kaizen Studio ships an update every 5 months, VO2 Max Training every 4 days. Both last shipped on November 4, 2026.

## The numbers

| Metric | Kaizen Studio | VO2 Max Training |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[4.6 (7 ratings)](https://appshunter.io/ios/app/vo2-max-training-peakvo2/id6532617265/reviews)** |
| Number of ratings | — | **7** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 5 months | **Every 4 days** |
| Monetization | — | Free with in-app purchases |
| Size | 55 MB | 16 MB |
| Requires iOS | **11.0.0** | 18.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, Apple Watch |
| Age rating | 4+ | 4+ |
| Developer | [Kaizen Fitness Health And Wellness LLC](https://appshunter.io/developer/1683392999) | [Cristian Serb](https://appshunter.io/developer/294833680) |

## What reviewers say

### Kaizen Studio

[App page](https://appshunter.io/ios/app/kaizen-studio/id6477789444)

**Features:** macOS Compatibility

**In-app purchases:** none


### VO2 Max Training

[App page](https://appshunter.io/ios/app/vo2-max-training-peakvo2/id6532617265)

This app provides science-backed interval training protocols to improve cardiovascular fitness and long-term health. It guides users through warm-ups, work intervals, and cool-downs with customizable timers and activity tracking.

**Highlights:** Science-backed interval protocols (Norwegian 4x4, Tabata, HIIT), Color-coded workout timer with phase transitions, Activity tracking with streaks and progress, Supports running, cycling, rowing, and indoor cardio, Fitness age estimation

**Features:** Apple Watch app

**In-app purchases (6)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Unlimited | $0.99 | per month |
| Unlimited | $3.99 | per month |
| Unlimited | $4.99 | per 3 months |
| Unlimited | $8.99 | per year |
| Unlimited | $11.99 | per 6 months |
| Lifetime | $17.99 | one-time |


## Frequently asked questions

### Is Kaizen Studio free?

Kaizen Studio is free to download, with no in-app purchases.

### Is VO2 Max Training free?

VO2 Max Training is free to download, with in-app purchases available.

### Do Kaizen Studio or VO2 Max Training have ads?

Neither Kaizen Studio nor VO2 Max Training shows ads.

### Which is updated more often, Kaizen Studio or VO2 Max Training?

Kaizen Studio ships an update every 5 months, and VO2 Max Training every 4 days. Most recently, Kaizen Studio was updated on November 4, 2026 and VO2 Max Training on November 4, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*