A suggestion:


I believe that many people training for sports would benefit if these separate countdown options could be chained. E.g. so that the application would give a short beep after every stage and the user sets off the alarm after the last phase.

This function would allow to to formulate training sessions such as:
1. 2 min activity
2. 5 min rest
3. 4 min activity
4. 5 min rest...and so on

My old well served Timex Ironman watch has 9 of these stages and I'm using this function on weekly basis.

In addition to the code, this function would require only a 'Chain' button to the user interface. And of course, more stages (9 of them) would be nice!