you can try wikango as well

Any Apps like a "stopwatch", and it will ring after every one minute so that I know 1 minute has pass. 

This app is mainly for me to do workouts, any recommendations ?   

I don't think there's such an app. If you are real keen on who called, you would have to tediously look through your contact list to find out. Otherwise just call the no. and the name from your contact list will show up unless of course you didn't save that particular no.