Looking for an app- a timer?

jessicagilb

Is there anything out there that I can set up a timer in intervals? Right now, all I have is whats on my phone, and if I want to do "30 sec jumping jacks, then 30 sec squats, etc" I have to stop inbetween to set my timer for the 30 sec. when it goes off, I have to stop again and reset. I want something that just beeps at me when 1 interval is up and goes right on to the next. Or am I completely dumb and theres a way to do it on the generic Galaxy s4 clock?