# Boost VO2 - Norwegian 4x4 — Improve your endurance!

> Improve your endurance! (iPhone/iPad app by Derinbogaz Ventures.)

- Source: https://appshunter.io/ios/app/boost-vo2-norwegian-4x4/id6748565289 (this page in markdown: same URL + `.md`)
- Developer: [Derinbogaz Ventures](https://appshunter.io/developer/1823779408)
- Category: Health & Fitness
- Price: Free
- Age rating: 4+
- Requires: iOS 15.1 · 38 MB
- Languages: English
- Released: 2025-07-15
- Data updated: 2026-07-04
- User reviews in markdown: https://appshunter.io/ios/app/boost-vo2-norwegian-4x4/id6748565289/reviews.md

## What is Boost VO2?

Boost your VO2 max and running performance with the Norwegian 4x4 interval training method.
WHAT IS 4X4 TRAINING?
The Norwegian 4x4 method consists of 4-minute high-intensity intervals followed by 3-minute recovery periods, repeated 4 times. This training protocol has been extensively researched and proven to significantly improve VO2 max and aerobic capacity.

KEY FEATURES:
Personalized Training Plans
Create custom 4x4 training programs based on your fitness level
Choose from 4-8 week plans with 1-4 workouts per week
Get estimated VO2 max improvements for your specific plan
Guided Workout Experience
Audio coaching with clear interval timing and instructions
Visual cues and haptic feedback during workouts
Automatic phase transitions (warmup, intervals, recovery, cooldown)
Voice coach selection for personalized motivation

PERFECT FOR:
Runners looking to improve aerobic capacity
Athletes training for endurance events
Fitness enthusiasts wanting to boost VO2 max
Anyone following the Norwegian 4x4 method

WHY CHOOSE BOOST VO2?
Unlike generic interval training apps, Boost VO2 is specifically designed for the Norwegian 4x4 protocol. Our app provides the exact timing, structure, and guidance needed to maximize your VO2 max improvements through this proven training method.
Start your journey to better aerobic fitness today with Boost VO2 - the ultimate 4x4 interval training companion.


## Version history (last 4 releases)

### 1.3 — 2025-09-03

Bug fixes

### 1.2 — 2025-08-21

Coach voice was not audible when screen got locked, with this version now we have fixed this issue. Happy running!

### 1.1 — 2025-08-11

Bug fixes

### 1.0 — 2025-07-16

No release notes.

## Apps similar to Boost VO2

| App | Rating | Price | Category |
| --- | --- | --- | --- |
| [VO2Max Training](https://appshunter.io/ios/app/vo2max-training/id6751254440) | 4.4 (7) | Free | Health & Fitness |
| [VO2 max Hero - AI Tracker](https://appshunter.io/ios/app/vo2-max-hero-ai-tracker/id6745514867) | — | Free | Health & Fitness |
| [Norwegian 4x4 HIIT - Myworkout](https://appshunter.io/ios/app/norwegian-4x4-hiit-myworkout/id6497329690) | 4.6 (12) | Free | Health & Fitness |
| [N4x4](https://appshunter.io/ios/app/n4x4/id6686407796) | 5.0 (3) | Free | Health & Fitness |
| [4x4 HIIT](https://appshunter.io/ios/app/4x4-hiit/id6755360081) | — | Free | Health & Fitness |
| [Tabata & HIIT Timer - PEAKVO2](https://appshunter.io/ios/app/tabata-and-hiit-timer-peakvo2/id6532617265) | — | Free | Health & Fitness |

## More apps by Derinbogaz Ventures

- [Pagee - Text to Speech Reader](https://appshunter.io/ios/app/pagee-text-to-speech-reader/id6753150487)
- [Pull‑Free: BFRB & Picking](https://appshunter.io/ios/app/pullfree-bfrb-and-picking/id6775877129)

All apps by Derinbogaz Ventures: https://appshunter.io/developer/1823779408

## Related topics

[norwegian 4x4 protocol](https://appshunter.io/ios/topics/norwegian-4x4-protocol) · [norwegian 4x4](https://appshunter.io/ios/topics/norwegian-4x4) · [vo2max training](https://appshunter.io/ios/topics/vo2max-training)

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-07-04.*