Myworkout 4x4

In-app purchases
3.6
31 reviews
Content rating
Everyone
1K+
Downloads
Content rating
Everyone
Learn more
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About this app

Myworkout 4x4 is the cardio exercise solution for adults who want a time-efficient way to live in good health with freedom from lifestyle diseases. Brought to you by the creators of the Norwegian 4x4 method.

Just over 30 minutes of exercise, twice a week, is all it takes.

• Based on established and peer-reviewed science.

• Measure and improve your VO2 max with accuracy far superior to current smartwatches and close to that of a calibrated lab test.

• Import workouts from Apple Health, Fitbit, Polar, and Garmin.

NOTES
A monthly recurring premium subscription is required for premium features and is available as an in-app purchase once you have registered an account. The subscription will automatically renew each month and will be charged through your app store account unless canceled at least 24 hours prior to the end of the current period. 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. If you are eligible for a free trial period, payment will be charged to your app store account as soon as it has expired. If not, then it will be charged at confirmation of purchase. Find the full terms and conditions, and our privacy policy, at http://myworkout.com/terms-and-privacy/.

Patients with cardiovascular disease should consult a physician before engaging in high intensity interval training.
The app uses your phone's GPS to track your position during use. Continued usage of GPS running in the background can dramatically decrease battery life.
Myworkout 4x4 can be used to both export activities to and import activities from Apple Health.
Updated on
May 13, 2026

Data safety

Safety starts with understanding how developers collect and share your data. Data privacy and security practices may vary based on your use, region, and age. The developer provided this information and may update it over time.
No data shared with third parties
Learn more about how developers declare sharing
This app may collect these data types
Location, Personal info and 7 others
Data is encrypted in transit
You can request that data be deleted

Ratings and reviews

3.6
31 reviews
Reg Hunt
March 26, 2025
requires email registration.
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Myworkout AS
March 28, 2025
Thanks for the feedback. We do offer "Login with Google" as an alternative. We have considered it and might support testing the app without registering an account in the future, but as it's right now designed to store your workout data and to process data from third party services it would require very big changes.
Rodolfo G
January 17, 2025
works well!!
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What’s new

- Redesigned workout timer that looks and guides you better
- Redesigned workout type picker to make it simpler
- The Norwegian 4x4 interval timer is now included as part of the Premium plan