Apps that allow you to track your running are nothing new, but Yog has a unique hook. You can invite other people from around the world to join you for a scheduled run. Progress appears on a map and there are audio notifications to spur you on. Research suggests that we push harder when we are competing, or even just when we know we are being observed, so Yog can really help to drive you on. It will also chart your performance, track your distance for each run, and you can listen to music while using the app.