With the help of control, the user is able to experience the game in a different way and co-finish with their device, phone or tablet.
According to Cnet, IOS's consistent control is the MFI certificates (Made for iPhone), such as Steelseries Nimbus not the Gamevice.
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For Android devices, there are more consistent rules such as the Rajiu Razer, MotoGamepad, Xbox1 and those that have been included for iOS, according to Adlzone.
On the other hand, Epic Games also explained that when your controller binds via Bluetooth, your device will be disabled to disable a battery to save battery.