---
title: "Norwegian 4x4 Protocol — App Overview"
url: https://marlvel.ai/apps/com-norwegian4x4-mobileapp
category: Health & Fitness
developer: Nikita Yampolski
platforms: ios, android
rating: 4.4 (48 ratings)
pricing: paid
report_level: overview
generated: 2026-04-24
last_verified: "2026-04-24T10:49:17.135Z"
---

<!-- SECTION: Key Insight -->
> **Key Insight:** While the app effectively solves the problem of tracking complex interval timing, user feedback indicates a lack of advanced features like heart rate synchronization and background activity support.

<!-- SECTION: Quick Facts -->
| Metric | Value |
|--------|-------|
| Category | Health & Fitness |
| Rating | 4.4 ★ (48) |
| Pricing | paid |
| Platforms | iOS, Android |
| Latest Version (iOS) | 2.4 |
| Latest Version (Android) | 1.0.61 |
| Developer | Nikita Yampolski |

<!-- SECTION: Summary -->
## What is Norwegian 4x4 Protocol?

Norwegian 4x4 Protocol is a specialized interval timer app designed to guide users through a specific 40-minute HIIT workout aimed at improving VO2 max. The app automates the timing for the warm-up, four-minute high-intensity intervals, active recovery periods, and cooldown phases. It is marketed as a structured solution for endurance athletes seeking to maintain consistency during their training sessions.

<!-- SECTION: Key Features -->
## Key Features

- **Interval Timer**: Provides a structured countdown for the 4x4 protocol, including warm-up, high-intensity intervals, active recovery, and cooldown phases.
- **Protocol Guidance**: Follows a scientifically-backed HIIT structure designed to keep users in an optimal training zone for VO2 max improvement.

<!-- SECTION: Target Audience -->
## Who is it for?

Endurance athletes such as runners, cyclists, and rowers looking to improve cardiovascular fitness through structured HIIT training.

<!-- SECTION: Links -->
## Links

- [App Store](https://apps.apple.com/us/app/norwegian-4x4-protocol/id6499464775?uo=2)
- [Google Play](https://play.google.com/store/apps/details?id=com.addison22.norwegian&hl=en&gl=us)
- [Full Intelligence Report](https://marlvel.ai/apps/com-norwegian4x4-mobileapp)

---
*This is an overview report. Sentiment analysis, competitive landscape, and SWOT analysis are available in the [full intelligence report](https://marlvel.ai/apps/com-norwegian4x4-mobileapp).*
*Generated by [Marlvel.ai](https://marlvel.ai) — Independent app intelligence.*