As you can see, this topic is already being diligently discussed here: - http://goo.gl/sbXChn - http://goo.gl/GXvkV8 - http://goo.gl/tYcLfk - http://goo.gl/Vke9fx
However, Migros is aware that there is a great need. As things stand at the moment, there are no plans for an app for Windows/Android phones.