# TrueZone vs Train.Red APP

The clearest difference is in-app purchases: Train.Red APP at none against TrueZone's 2. On price, update cadence, ads and device support there is nothing between them.

Both are free to download. TrueZone sells 2 one-off in-app purchases. Train.Red APP asks for nothing beyond the download.

Both ship on a similar rhythm, roughly every 3 weeks. The most recent releases landed on May 16, 2026 and July 30, 2026 respectively.

## The numbers

| Metric | TrueZone | Train.Red APP |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/trainred-app/id6451237438/reviews)** |
| Number of ratings | — | **1** |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 3 weeks | Every 3 weeks |
| Monetization | — | Free |
| Size | 72 MB | 101 MB |
| Requires iOS | 14.0 | **13.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Driftline ehf.](https://appshunter.io/developer/1574232641) | [Train.Red B.V.](https://appshunter.io/developer/1646391181) |

## What reviewers say

### TrueZone

[App page](https://appshunter.io/ios/app/truezone/id1574232639)

**Features:** macOS Compatibility

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Heart rate analysis | $5.99 | one-time |
| 10 fitness tests | $49.99 | one-time |


### 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 TrueZone free?

TrueZone is free to download, with in-app purchases available.

### Is Train.Red APP free?

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

### Do TrueZone or Train.Red APP have ads?

Neither TrueZone nor Train.Red APP shows ads.

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

TrueZone ships an update every 3 weeks, and Train.Red APP every 3 weeks. Most recently, TrueZone was updated on May 16, 2026 and Train.Red APP on July 30, 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.*