Date	Author	Comment
2026-08-18	dt*****	App resets itself at each interval. Doesn’t work
App resets itself at each interval. Doesn’t work
2026-03-15	Er*****	This app is essentially a timer, there is no guided instruction, which is difficult as a beginner. Also, when the app went in the background, it closed and kept starting over again during my workout. Do not recommend.
This app is essentially a timer, there is no guided instruction, which is difficult as a beginner. Also, when the app went in the background, it closed and kept starting over again during my workout. Do not recommend.
2026-03-02	th*****	I see why a trial period was not an option, I wouldn’t have purchased. I was expecting a linkage to target heart rates and the Apple Watch pulse reading.
I see why a trial period was not an option, I wouldn’t have purchased. I was expecting a linkage to target heart rates and the Apple Watch pulse reading.
2025-12-19	la*****	It has the right times, but no tracking history and goes out when have to use your electronic for either a phone call or email etc
It has the right times, but no tracking history and goes out when have to use your electronic for either a phone call or email etc
2025-11-02	Mi*****	This app handles the timing for 4 x 4 intervals. It is quite simple and works effectively. I have sometimes in the past lost track of which interval I was on this app solves the problem.
This app handles the timing for 4 x 4 intervals. It is quite simple and works effectively. I have sometimes in the past lost track of which interval I was on this app solves the problem.
2025-10-12	Ni*****	I am not using this app any more. Instead I found a HIIT routine that is a far more effective calorie burner. Also I hate being chained to a timer.
I am not using this app any more. Instead I found a HIIT routine that is a far more effective calorie burner. Also I hate being chained to a timer.
2025-08-25	Be*****	HR doesn’t fully sync.
HR doesn’t fully sync.
2025-08-22	WJ*****	Was excited to use this app but quickly became disappointed when I learned the heart rate doesn’t not sync with app when using Apple Watch. It remains frozen on the reading for heart rate, which defeats the purpose for this app. Supports response is they don’t control 3rd party apps.
Was excited to use this app but quickly became disappointed when I learned the heart rate doesn’t not sync with app when using Apple Watch. It remains frozen on the reading for heart rate, which defeats the purpose for this app. Supports response is they don’t control 3rd party apps.
2025-07-23	Fi*****	Love it ! Big help in getting me back to a state of fitness after years of neglecting my wellness
Love it ! Big help in getting me back to a state of fitness after years of neglecting my wellness
2025-05-25	Ju*****	To make this work you have to keep you screen on and with that app open-fully.
To make this work you have to keep you screen on and with that app open-fully.

Reviews of Norwegian 4x4 Protocol

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