SimpleIntervals Online

SimpleIntervals Online lets you time intervals for workouts, right in your web browser. Start it and you get 20/10 intervals with optional sounds, perfect for doing Tabata interval training.

SimpleIntervals Mobile

If you like SimpleIntervals Online, give SimpleIntervals Mobile a try on your iPhone or iPad. It's a mobile app that lets you select interval times, use sounds, and has the same visual ticker as the online version. Click the link below to view the app in iTunes.

SimpleIntervals on iPhone