The Norwegian 4x4 App is the perfect companion for anyone looking to implement the 4x4 training protocol into their routine.
Cost / License
- Free
- Proprietary
Platforms
- Android
- iPhone
- iPad
- Android Tablet



HIIT is described as 'The first rule of Zombieland; cardio' and is an app in the sport & health category. There are more than 10 alternatives to HIIT for a variety of platforms, including Android, iPhone, iPad, F-Droid and Android Tablet apps. The best HIIT alternative is TimeR Machine, which is both free and Open Source. Other great apps like HIIT are Workout Time!, Custom Workouts, Interval Timer (PFA) and Just Another Workout Timer.
The Norwegian 4x4 App is the perfect companion for anyone looking to implement the 4x4 training protocol into their routine.







Sportos is the most popular Mac alternative to HIIT.
Sportos is the most popular commercial alternative to HIIT.