[GusClark]

I was thinking that it would be easy to add this functionality to my pebble watch.

[DanitaBaires]

I was exactly what I thought. Is there any "watchapp" that does this?

[metalcring]

There is an interval trainer app for running but I think it will work for this. Set it up for 5 minute intervals and you should get a similar functionality. The only thing is it won't run in the background so you have to keep the app open.