Before you pay consider this... – Bit Timer - Interval Timer for HIIT, Tabata, Crossfit, Running and Circuit Training Review

If you wear glasses (Reading or prescription) and like most don’t carry them when you do intervals you’re not going to be able to see the very small text used to show total intervals and intervals remaining. Interval counts also completely disappear when paused. Great function, horrible GUI. Just not worth paying for yet.
Review by ZoomAddict on Bit Timer - Interval Timer for HIIT, Tabata, Crossfit, Running and Circuit Training.