Best Interval Timer

Best Interval Timer acts as your personal workout coach—right in this Chrome extension—helping you focus on reps while it handles all the timing. The free version includes one default routine, which you can customize to include warm-up, high and low intensity intervals, cool down, and rest, with as many sets as you wish. Key features include a large countdown display, start/pause/reset controls, background and foreground playback, music support, optional vibration, 15 interval sounds, and 12 background interval pictures. You can track how many times you’ve practiced a routine, switch between portrait and landscape modes, and set a reminder to alert you during workouts. This extension supports universal version and can be used across devices.

If you have questions or suggestions, please email userfeed@vip.tom.com. It offers flexible routines for warm‑ups, work/rest cycles, landscape/portrait modes, and multitasking, so you can stay focused on your workout while timing runs in the background.