** For multiple profile and custom alarm support, please consider purchasing the HIIT IT Pro Timer ** Hate asking for a friend to come workout just so you can measure the workout intervals? Needs a workout timer that can switch between completely different workout sets effortlessly?HIIT IT Pro is the best High intensity interval training (HIIT) timer on android for serious training. You can customize any of the 4 existing time intervals to fit your needs. Automatic void alerts will notify of your progress. Features- warmup/down times.- Better GUI!- Notification/Vibrate.- Better voice alerts.- warm up,workout, rest, cool down intervals- track workout sets- auto voice alerts, countdown.