Workouttimer

HIIT and other interval type training timer. One of the most versatile on the play store. Now and forever free, no adds and no restrictions in usability for the free version. There will be a donate version soon, but this, free version, will be identical.

- Unlimited workouts and exercises

- Automatically change exercise and/or rest times with each cycle

- Extra rest between cycles

- Speech output with some flexibility in what to announce

- Exercise is divided into Prep/Exercise/Rest

- Warm-up and cool down period

- Connect external heart rate sensor through Bluetooth

- Heart rate chart and analysis for the workout duration

- Save and load charts

Future plans:

- Measure heart rate using the camera

- Get summary data from Fitbit

... and more