ProtoFit: Workout & HIIT Timer is described as 'ProtoFit: Workout & HIIT timer is a workout timer and tracker app. With its custom exercise parameters, it is the most versatile workout timer suitable for any workout type, including tabata, HIIT, interval training and more' and is an app in the sport & health category. There are more than 10 alternatives to ProtoFit: Workout & HIIT Timer for a variety of platforms, including Android, iPhone, iPad, F-Droid and Android Tablet apps. The best ProtoFit: Workout & HIIT Timer alternative is OpenHIIT, which is both free and Open Source. Other great apps like ProtoFit: Workout & HIIT Timer are TimeR Machine, Workout Time!, Custom Workouts and Interval Timer (PFA).