Tabata Workout Interval Timer is for a high-intensity workout protocol that has fitness and weight-loss benefits. Using 20-second exercise and 10 second rest sessions to achieve your workout goal. Tabata Workout Interval Timer uses different color to let you easily know each workout status. purple get ready pink: warm up teal: exercise red: rest cyan: recovery (recovery interval after one cycle is completed.) blue: cool down Tabata Workout Interval Timer also allows you to adjust time for each session and enable/disable speech notification for next session.