A HIIT Interval Timer is a free Android application developed by Pimpim Mobile that serves as a customizable workout timer for interval training. It is an easy-to-use application that allows users to create their own sets and workouts, making it the best timer for crossfit, HIIT, interval, tabata, round, running, c25k training, and more. With text-to-speech support, users can easily follow their exercises as they are announced, including the round number, and stay motivated throughout the workout. However, some of the features require the purchase of A HIIT License in the play store. The application also offers custom warnticks and alarms for exercises, an option to pause the workout when receiving a call or disconnecting the headset or Bluetooth, and a backup/import function to share and store workouts and sets.