# Norwegian 4x4 Protocol vs Viscera

The clearest difference is price: Viscera at $1.99 against Norwegian 4x4 Protocol's $5.99. Norwegian 4x4 Protocol's advantage is chart position (#148 vs unranked). On update cadence, ads, in-app purchases and device support there is nothing between them.

Norwegian 4x4 Protocol costs $5.99 and Viscera $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Norwegian 4x4 Protocol ships an update every 3 weeks, Viscera monthly. The most recent releases landed on October 18, 2026 and October 17, 2026 respectively.

## The numbers

| Metric | Norwegian 4x4 Protocol | Viscera |
| --- | --- | --- |
| Price | $5.99 | **$1.99** |
| Rating | **[4.3 (54 ratings)](https://appshunter.io/ios/app/norwegian-4x4-protocol/id6499464775/reviews)** | — |
| Number of ratings | **54** | — |
| Positive reviews | 25.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 3 weeks** | Monthly |
| Monetization | Paid | — |
| Best chart rank | **#148** | — |
| Size | 5 MB | 3 MB |
| Requires iOS | **17.6** | 18.5 |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 17+ |
| Developer | [Nikita Yampolski](https://appshunter.io/developer/1441915166) | [Hans Christian Christensen](https://appshunter.io/developer/1843828134) |

## What reviewers say

### Norwegian 4x4 Protocol

[App page](https://appshunter.io/ios/app/norwegian-4x4-protocol/id6499464775)

**Currently charting:** #148 Top Paid · Health & Fitness (US App Store)

This app guides you through the effective Norwegian 4x4 interval training method to boost cardiovascular performance and endurance. It features a precision timer, heart rate zone tracking, and progress monitoring for scientifically proven results.

**Highlights:** Precision 4min work / 3min rest cycles, Heart rate zone tracking (90-95% max HR), VO2 Max improvement tracking, Multiple HIIT workout protocols, Progress monitoring, Universal cardio training support, Offline functionality

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

**In-app purchases:** none


### Viscera

[App page](https://appshunter.io/ios/app/viscera/id6753583907)

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

**In-app purchases:** none


## Frequently asked questions

### Is Norwegian 4x4 Protocol free?

Norwegian 4x4 Protocol costs $5.99, with no in-app purchases.

### Is Viscera free?

Viscera costs $1.99, with no in-app purchases.

### Do Norwegian 4x4 Protocol or Viscera have ads?

Neither Norwegian 4x4 Protocol nor Viscera shows ads.

### Which is updated more often, Norwegian 4x4 Protocol or Viscera?

Norwegian 4x4 Protocol ships an update every 3 weeks, and Viscera monthly. Most recently, Norwegian 4x4 Protocol was updated on October 18, 2026 and Viscera 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.*