Except you can use this to tell you in advance when you can run, so you know when to take you're 1/2 way break. And a discrete timer that vibrates in my pocket

Except you can use this to tell you in advance when you can run, so you know when to take you're 1/2 way break. And a discrete timer that vibrates in my pocket disturbs noone. And it does it at the best possible times.