It's no surprise that more and more people are exercising with their smartphone in tow. Whether you like to listen to music, podcasts or simply stay connected, having a phone handy while running, biking, hiking, or working out in a gym is a fact of life for many people. The problem arises in just how to transport the phone without impacting your movement. That's why the interest in smart watches has risen, as many of the functions of your phone can be replaced with a smaller device strapped to your wrist. Not bad, but now have to shell out another couple of hundred dollars (plus you've got another gadget to learn).