N4x4 User Reviews

Is N4x4 Safe?

Not enough ratings yet to assess N4x4.

Is N4x4 Legit?

N4x4 appears legitimate, with a few gaps. AppsHunter Legitimacy Score for N4x4 is 70/100.

Based on 70 of 100 points across 7 verification signals from App Store and developer data.

Top reviews

VO2 max history chart missing

App works well for HIIT on my elliptical using a Garmin HRM chest strap, but the VO2 max history chart does not appear anywhere. Sharing with Apple Health is turned on, so I don’t know what the problem is.

Response from developer

The latest version of the app contains some troubleshooting steps. Please let me know if that doesn't solve your problem!

Great and Free

Exactly what I was looking for. Great UI, simple and focused on running for better health and better VO2max.
Suggestions:
1. Please add a feedback option in the app as a way to send feedback or bugs.
2. Would be highly appreciated if you could add support for health wearables that broadcast their HR (Like Whoop).
Thank you
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Response from developer

Thank you for the great feedback and review. I'm glad you alerted me that Whoop and other HR monitors could send real time heart rate. I mistakenly thought it was only Apple Watch. Whoop and Garmin integration is now in the new version.

Excellent update

I have been using this app for 6 weeks. The original version was basic and effective. For a free app, I couldn’t be happier. The update adds everything I was missing and compensating for by running multiple apps at the same time during the workout. Thank you!

Response from developer

Thank you so much for the time you took to leave a review. I'm glad you find it useful.

No live Heart Rate

Disappointing. Screen should show live heart rate or at least zone during the exercise.

Response from developer

Full Apple Watch (and more heart rate monitors) integration plus live HR display and real time voice coaching in the latest version. Enjoy :-)

Needs HR in display

All it shows is time and target heart rate in the interval. Takes up whole screen as it should…but didn’t find a way to display my live heart rate. So it’s just a timer if you ask me.

Response from developer

Full Apple Watch integration in latest version. Enjoy :-)

10/10

The app does exactly what it should and it does so with style.