# Cardio Zones. vs VO2 STUDIO

The clearest difference is price: VO2 STUDIO at Free against Cardio Zones.'s $49.99. Cardio Zones.'s advantage is update cadence (every 5 weeks vs every 3 months) and device support (4 vs 2). On ads, in-app purchases and iOS requirement there is nothing between them.

VO2 STUDIO is free to download; Cardio Zones. costs $49.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Cardio Zones. ships an update every 5 weeks, VO2 STUDIO every 3 months. The most recent releases landed on October 17, 2026 and October 7, 2026 respectively.

## The numbers

| Metric | Cardio Zones. | VO2 STUDIO |
| --- | --- | --- |
| Price | $49.99 | **Free** |
| Rating | **[4.3 (40 ratings)](https://appshunter.io/ios/app/cardio-zones/id1103232564/reviews)** | — |
| Number of ratings | **40** | — |
| Positive reviews | 47.6% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 5 weeks** | Every 3 months |
| Monetization | Paid | — |
| Size | 28 MB | 210 MB |
| Requires iOS | 15.6 | **15.0** |
| Devices | **iPhone, iPad, iPod, Apple Watch** | iPhone, iPod |
| Age rating | 12+ | 12+ |
| Developer | [Theo Scott](https://appshunter.io/developer/691156625) | [VO2 TRAINING SA](https://appshunter.io/developer/1648270657) |

## What reviewers say

### Cardio Zones.

[App page](https://appshunter.io/ios/app/cardio-zones/id1103232564)

Train effectively by keeping your heart rate within target zones during various activities. Analyze your performance with cumulative graphs and track your routes. Measure fitness metrics and access preloaded or custom heart rate zones.

**Highlights:** Voice assistant for heart rate zone guidance, Cumulative graphs of time in heart rate zones, Fitness level and recovery heart rate rating, Resting Heart Rate & VO2 Max measurement, Preloaded and custom heart rate zones, Location tracking of routes with heart rate data, Export heart data to CSV for analysis

**Features:** macOS Compatibility, Apple Watch app, Vision Pro support

**In-app purchases:** none


### VO2 STUDIO

[App page](https://appshunter.io/ios/app/vo2-studio/id1237176267)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Cardio Zones. free?

Cardio Zones. costs $49.99, with no in-app purchases.

### Is VO2 STUDIO free?

VO2 STUDIO is free to download, with no in-app purchases.

### Do Cardio Zones. or VO2 STUDIO have ads?

Neither Cardio Zones. nor VO2 STUDIO shows ads.

### Which is updated more often, Cardio Zones. or VO2 STUDIO?

Cardio Zones. ships an update every 5 weeks, and VO2 STUDIO every 3 months. Most recently, Cardio Zones. was updated on October 17, 2026 and VO2 STUDIO on October 7, 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.*