MapMyRUN's controls could use a bit of fine-tuning, but I found it a very useful tool for planning my workouts. The Web-based app syncs with the company's mobile apps, which allow you to use the GPS on your iOS or Android device to record your workouts as they happen. The mobile interface isn't as slick as that offered by the Nike+GPS app, but the desktop component is far superior: While the NikePlus.com service often feels like one big Nike ad, MapMyRUN.com manages to put you--and your workouts--front and center.