From Sony Computer Entertainment Europe Limited:
STAY IN THE GAME. Take your PlayStation experience with you on your mobile device with the new PlayStationApp. Always be ready to game with features that keep you connected to your gaming friends and the games you love to play. Push games from PlayStationStore to your PS4 system and be ready to game at home. With the PlayStationApp installed on your mobile device, you can: See what your friends are playing, compare trophies, and view your profile or recent activity. Chat with your friends; receive notifications, game alerts, and invitations, and then use your mobile device as an on-screen keyboard for your PS4 system. Browse PlayStationStore, pick-up the latest hit games and add-ons, and then push them to your PS4 system so they are ready when you get home. Take advantage of the in-app second-screen features, when available, for greater challenges and control. Quickly access PlayStation system guides, manuals, and PlayStation. Blog. A Sony Entertainment Network account and PS4 system are required to use all of this application's features.