Firstly, we would like to thank all the Windows Phone users we've had over the years for supporting Endomondo as their main activity tracker.
Unfortunately however, our app for Windows Phones has been out of development since late 2014 and therefore, after careful consideration, we have made the difficult decision of removing support for Windows devices and we have removed our app for download from the Windows Market Place.
If you have already downloaded the app on your Windows device, then please continue tracking with it as you have been doing in the past, but please be aware that if you delete the app from your phone, then you will not be able to download it again from Windows Market Place.
Unfortunately we cannot troubleshoot issues on the Endomondo application for Windows devices.
For any inquiry please get in touch with our Support Team here and please accept our apologies for any inconvenience this may have caused.