Problem is that such a function would have to come directly from Microsoft or one of its ultra-platinum, secret-handshake knowing blood-brother partners, not a normal app developer.
Unlike Android, which allows apps that are essentially cross-app utilities, Windows Phone sandboxes apps so that one cannot affect another. That means you or I couldn't make an app like you describe. Microsoft certainly could, and they very well might have something in the works, but there's no way to know.
Hate to give a downer answer, but hope it helps.