Unfortunately, the MapMyFitness application suite is no longer compatible with Windows or Tizen phones. A change to the API was made in early February 2016 which will prevent Windows phone users from logging into any MapMyFitness application. The decision to discontinue support for Windows phones was not made hastily. After reviewing user data, we realized that the work required to remain compatible and functional on this constantly evolving platform was no longer possible to maintain. We truly apologize for any inconvenience this may cause, and encourage you to use our website, www.mapmyfitness.com, as an alternative.