The app will, once the game is out, interact with it across all three platforms and has modes to run with or without the wrist-mounted Pip-Boy accessory.
Right now it’s pretty limited. You can run it in demo mode just to see how it looks on your phone’s screen. One feature that does already work, albeit in a minimal way, is its ability to play holotapes, an item you can pick up in the game. One such holotape is for a Missile Command clone called Atomic Command.
Fallout 4 is set to release for PC, PlayStation 4, and Xbox One on Nov. 10. If you can’t wait in the meantime, there are some convincing comparison screenshots worth checking out, a chat app complete with Fallout emoji to play with, and the possibility of Skyrim getting a release on current consoles to contemplate.