Seconds Interval Timer is described as 'LOOK NO FURTHER, you have just found the most advanced interval training timer on the App Store. Seconds has been downloaded over 4 million times, and has over 8000 5-star reviews. Other interval timers don't even come close when it comes to quality, features and ease of use' and is an app in the sport & health category. There are more than 10 alternatives to Seconds Interval Timer for a variety of platforms, including Android, iPhone, iPad, F-Droid and Android Tablet apps. The best Seconds Interval Timer alternative is OpenHIIT, which is both free and Open Source. Other great apps like Seconds Interval Timer are TimeR Machine, Workout Time!, Custom Workouts and Interval Timer (PFA).