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No official word. So far it is just a rumor.
In Apple's case that could mean anything. In Microsoft's case that probably means that they are working on it, but even if they have a time line, that is no guarantee of when, or even if it will be released.
Wait and see. If you need an app now, I wouldn't put off purchasing one. Chances are that it will do something that the official one won't, and still be useful.