It makes no sense for Microsoft to offer 3rd party app links to rival platforms, unless of course it’s for Microsoft’s own like Skype. Clearly, Microsoft will likely offer 3rd part app links to both Windows and Windows Phone, rather than iOS and Android. For 3rd party apps, you can now just search on the Microsoft Store website, and be given an overview page of the app, for example MetroTube (see image below). Clicking on one of the choices takes you to the appropriate download page, say on Google Play or the Windows Phone app store.
As you can see, for a Microsoft app, you’re given a choice of platforms.
