The popular Remote CDU app, with almost 10.000 downloads alone here at AVSIM, has now been updated to v.3.1., adding full support for Lockheed Martin's Prepar3D v4.
So for all you early adopters flying your PMDG fleet with the latest in FlightSim technology, This update is FREE for all existing customers.
With this version, Remote CDU supports PMDG's 737, 747 and 777 aircraft for all of these platforms: FSX, FSX:SE, Prepar3D v2, v3 and v4.
If you aren't using Remote CDU yet, feel free to download the free-to-view app from the link above to see how it looks & feels like on your mobile device. Flying a Remote CDU supported aircraft becomes yet one notch more realistic being able to use a physical device to interact with the simulated (M)CDU