The Windows Phone version of Sports Tracker has been just updated. The version 1.1 addresses some stability and connection issues. Also the incorrect altitude data displayed in the workout view has been fixed in this update. In Sports Tracker v.1.1 for Windows Phone German language support has been added. Unfortunately Bluetooth Heart Rate Monitor is still not supported as Windows Phone platform does not yet support the necessary Bluetooth profile. The updated app is now available from Windows Phone Marketplace.
Source: Sports Tracker