# VO2 Master Manager vs Train.Red APP

The clearest difference is rating: Train.Red APP at 5.0 against VO2 Master Manager's 4.0. VO2 Master Manager's advantage is ratings volume (9 vs 1). On price, update cadence, ads and in-app purchases there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Train.Red APP holds the better App Store score, 5.0 against 4.0. That said, the two scores are not equally well evidenced: VO2 Master Manager has 9 ratings behind it against 1, so its average is the more settled of the two.

VO2 Master Manager ships an update every 5 weeks, Train.Red APP every 4 weeks. The most recent releases landed on October 12, 2026 and October 3, 2026 respectively.

## The numbers

| Metric | VO2 Master Manager | Train.Red APP |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.0 (9 ratings)](https://appshunter.io/ios/app/vo2-master-manager/id936519055/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/trainred-app/id6451237438/reviews)** |
| Number of ratings | **9** | 1 |
| Positive reviews | 66.7% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 5 weeks | **Every 4 weeks** |
| Monetization | Free | Free |
| Size | 87 MB | 100 MB |
| Requires iOS | 16.0 | **15.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [VO2 MASTER HEALTH SENSORS INC](https://appshunter.io/developer/936519054) | [Train.Red B.V.](https://appshunter.io/developer/1646391181) |

## What reviewers say

### VO2 Master Manager

[App page](https://appshunter.io/ios/app/vo2-master-manager/id936519055)

This tool collects and displays performance data including VO2, heart rate, and power. It also monitors speed, cadence, and muscle oxygenation for comprehensive analysis.

**Highlights:** VO2 monitoring, Heart rate tracking, Power data collection, Speed and cadence monitoring, Muscle oxygenation data, Performance analysis

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


### Train.Red APP

[App page](https://appshunter.io/ios/app/trainred-app/id6451237438)

This app monitors muscle oxygen saturation to provide real-time physiological insights for athletes and coaches. It helps optimize performance, track recovery, and analyze training data with actionable metrics.

**Highlights:** Muscle oxygen saturation monitoring, Real-time physiological insights, Performance and recovery tracking, Workout analysis and data export, Team/organization structure, Live data overlay

**In-app purchases:** none


## Frequently asked questions

### Is VO2 Master Manager free?

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

### Is Train.Red APP free?

Train.Red APP is free to download, with no in-app purchases.

### Which has better reviews, VO2 Master Manager or Train.Red APP?

Train.Red APP is rated higher. VO2 Master Manager averages 4.0 out of 5 from 9 ratings, while Train.Red APP averages 5.0 from 1 ratings.

### Do VO2 Master Manager or Train.Red APP have ads?

Neither VO2 Master Manager nor Train.Red APP shows ads.

### Which is updated more often, VO2 Master Manager or Train.Red APP?

VO2 Master Manager ships an update every 5 weeks, and Train.Red APP every 4 weeks. Most recently, VO2 Master Manager was updated on October 12, 2026 and Train.Red APP on October 3, 2026.

---

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