An attachment for PS4
PS4 Second Screen is a free gaming-oriented app that allows you to operate your PS4 on your device. It’s a tool with a clean interface, making it easy to navigate the settings. Note that you will need to sign in to your PlayStation™ Network account to access this utility.
Features and manual configuration
When connected to your PS4 console, PS4 Second Screen displays in-game information as you play. You can also use it to enter text on your console and as a controller. Other features include using the app to view comments during broadcasts and display party chat as text.
Note that you will need to connect your device and PS4 to the same network for this to work. You will also manually configure the connection on your console. Keep in mind that your internet connectivity must be on Wi-Fi as you might encounter linking errors when using mobile data.
Add another screen
If you need an additional screen while playing on your console, PS4 Second Screen can be a great help. It allows you to use your device as a controller and read broadcast comments. Just keep in mind that your PS4 and device need to be connected to the same network.