Commonly recommended by physical therapists, contrasting is the process of submerging your muscles/joints into alternating warm & cold water. The warm water causes your muscle to expand, while the cold water causes your muscle to contract - this produces a 'pumping' action which can clear out built-up, pain-causing toxins and waste products.

Contrast Timer is designed for anyone using contrast therapy (or hot/cold immersion therapy) for muscle or joint pain. Between texting, playing games, and simply holding a phone or tablet throughout the day, the affliction of thumb & wrist pain is increasingly common, even among otherwise-healthy young people. Occasional contrasting can provide real relief to these conditions.

This app does all the work of timing your periods of warm and cold immersion, prompting you to switch baths using simple changes of color, sound, and a visible countdown timer. Why fumble with timers when your hands are dripping wet? Contrast Timer will take care of it for you.