I've a Pebble. You can use it as a remote for your music. I regularly use mine with RunKeeper that has a nice interface that shows me my pace, time, distance et

I've a Pebble. You can use it as a remote for your music. I regularly use mine with RunKeeper that has a nice interface that shows me my pace, time, distance etc. when I'm running. I'm not sure about the stopwatch and heartbeat as they aren't there out-of-the-box, but I'm pretty sure there are that type of apps that have a Pebble interface.