# N4x4 vs 4x4 Treadmill

The clearest difference is in-app purchases: N4x4 at none against 4x4 Treadmill's 1. N4x4 also leads on device support. On price and iOS requirement there is nothing between them.

Both are free to download. 4x4 Treadmill sells 1 one-off in-app purchase. N4x4 asks for nothing beyond the download.

## The numbers

| Metric | N4x4 | 4x4 Treadmill |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.5 (20 ratings)](https://appshunter.io/ios/app/n4x4/id6686407796/reviews)** | — |
| Number of ratings | **20** | — |
| Positive reviews | 66.7% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | — |
| Update frequency | Every 3 days | — |
| Monetization | Free | — |
| Size | 15 MB | 8 MB |
| Requires iOS | 17.5 | **16.6** |
| Devices | **iPhone, Apple Watch** | — |
| Age rating | 4+ | 4+ |
| Developer | [Jan van Rensburg](https://appshunter.io/developer/1688121173) | [Proglab AS](https://appshunter.io/developer/1144688859) |

## What reviewers say

### N4x4

[App page](https://appshunter.io/ios/app/n4x4/id6686407796)

This app guides you through the scientifically-backed Norwegian 4x4 HIIT protocol to efficiently boost your VO2 Max and cardiovascular health. It offers set-and-forget workouts with visual and audio cues, suitable for all fitness levels.

**Highlights:** Norwegian 4x4 HIIT protocol, Set-and-forget workout structure, Visual and audio interval cues, Real-time heart rate zone display, 5-minute warm-up, 4 rounds of 4-minute intervals, 3-minute recovery periods

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

**In-app purchases:** none


### 4x4 Treadmill

[App page](https://appshunter.io/ios/app/4x4-treadmill/id6758803671)

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 4x4 Treadmill Premium | $4.99 | one-time |


## Frequently asked questions

### Is N4x4 free?

N4x4 is free to download, with no in-app purchases.

### Is 4x4 Treadmill free?

4x4 Treadmill is free to download, with in-app purchases available.

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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.*