# Train.Red APP vs Studio T23

The clearest difference is update cadence: Studio T23 at every 9 days against Train.Red APP's every 4 weeks. Train.Red APP's advantage is device support (3 vs 1). On price, ads, in-app purchases and iOS requirement 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 ships an update every 4 weeks, Studio T23 every 9 days. The most recent releases landed on October 3, 2026 and October 17, 2026 respectively.

## The numbers

| Metric | Train.Red APP | Studio T23 |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/trainred-app/id6451237438/reviews)** | — |
| Number of ratings | **1** | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 4 weeks | **Every 9 days** |
| Monetization | Free | — |
| Size | 100 MB | 100 MB |
| Requires iOS | **15.0** | 16.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Train.Red B.V.](https://appshunter.io/developer/1646391181) | [FITsociety BV (Apps)](https://appshunter.io/developer/1756257213) |

## What reviewers say

### 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


### Studio T23

[App page](https://appshunter.io/ios/app/studio-t23/id6782046095)

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

**In-app purchases:** none


## Frequently asked questions

### Is Train.Red APP free?

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

### Is Studio T23 free?

Studio T23 is free to download, with no in-app purchases.

### Do Train.Red APP or Studio T23 have ads?

Neither Train.Red APP nor Studio T23 shows ads.

### Which is updated more often, Train.Red APP or Studio T23?

Train.Red APP ships an update every 4 weeks, and Studio T23 every 9 days. Most recently, Train.Red APP was updated on October 3, 2026 and Studio T23 on October 17, 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.*