Norwegian 4x4 HIIT - Myworkout

Norwegian 4x4 HIIT - Myworkout

Improve VO2max & heart health

15 ratings
3 reviews
Free
In-App Purchases

Details

  • Released
  • Updated
  • October 23, 2024
  • August 5, 2026
Norwegian 4x4 HIIT - Myworkout video #1 for iPhone
Norwegian 4x4 HIIT - Myworkout screenshot #2 for iPhone
Norwegian 4x4 HIIT - Myworkout screenshot #3 for iPhone
Norwegian 4x4 HIIT - Myworkout screenshot #4 for iPhone
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About

This app offers a science-backed cardio exercise program designed to improve health and prevent lifestyle diseases. It focuses on efficient workouts, measuring VO2 max with high accuracy, and integrating with popular fitness trackers. A premium subscription unlocks full features.

Time-efficient cardio workouts
VO2 max measurement and improvement
Prevention of lifestyle diseases
Integration with Apple Health, Fitbit, Polar, Garmin
Science-based and peer-reviewed methodology
GPS activity tracking
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What's New in Norwegian 4x4 HIIT

1.22.0

August 5, 2026

- Add lifetime purchase option - Improve connection to HRM devices during workouts and how we display this information in the workout details - Improvements of workout timer UX

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Subscription plans

Premium Monthly

Access to premium features. Billed monthly

$9.991 Month
7 Days trial
How to cancel Norwegian 4x4 HIIT subscription ⁉️

User reviews

Until..

They wanted $10/mo for it. Nice UI that includes live HR. But really all I need is the timer and hr with prompts per interval. The high intensity segments can only use one peanut butter power reading. For real V02 calc I assume need to be able to input actual power ave per segment. Even if not,
I want to record actuals as of course that likely varies.
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Response from developer

Thanks for the feedback. Just to clarify: the app does support entering the average power reading for each individual high-intensity interval. Tap the chevron to open each stage separately, and you can record a separate power value for each interval. If your last comment refers to reading and storing values automatically from a power meter, that is not currently supported, but we appreciate the input and would like to understand that use case better. Feel free to reach out to our support so we can assist you better and understand your needs.

Wonderful

This works great for the Norwegian 4x4 protocol. I can’t say enough good things about this app. I just discovered their research paper on PubMed. Awesome!

Response from developer

Thank you for the great review. We’re glad to hear the app works well for your Norwegian 4x4 training, and we really appreciate that you took the time to look into the research behind the method. Thanks for using the app.

Wonderful

This works great for the Norwegian 4x4 protocol.

Developer apps

FAQ

What is the Norwegian 4x4 HIIT method?

The Norwegian 4x4 HIIT method is a science-based cardio exercise program that involves short, intense workouts twice a week to improve VO2 max and overall health, aiming to prevent lifestyle diseases.

How accurate is the VO2 max measurement?

The app measures and improves your VO2 max with accuracy far superior to current smartwatches and close to that of a calibrated lab test.

Can I import my past workouts?

Yes, you can import workouts from Apple Health, Fitbit, Polar, and Garmin, allowing you to consolidate your fitness data within the app.

What lifestyle diseases can this app help prevent?

The app aims to help prevent common lifestyle diseases such as Diabetes, Parkinson's, and Arthritis through regular, high-intensity cardio exercise.

Is there a free trial for the premium subscription?

Yes, both the Premium Monthly and Premium Yearly subscription plans offer a 7-day free trial period before payment is charged.

How do I cancel my subscription?

You can turn off auto-renew at any time from your app store account settings. Cancellation of the current active subscription period is not allowed.

Does Norwegian 4x4 HIIT have ads?

No, the app does not contain advertisements. It operates on a freemium model where core features are free, and premium features require a subscription.

What devices is Norwegian 4x4 HIIT available on?

The app is currently supported on iPhone and iPod devices, with a focus on providing a high-quality experience for these platforms.