Well you have Athos clothing trackers coming out soon, which tracks muscle exertion. Thing is although, it costs $300-$400 dollars. Runkeeper works with the p

Well you have Athos clothing trackers coming out soon, which tracks muscle exertion. Thing is although, it costs $300-$400 dollars. Runkeeper works with the phone you already have, and you can optionally add a couple of $50-$150 accessories. Very different price points.