A free app for Android, by Garage Research Emulators.
The INES app is a free emulator for Android that allows you to play games from your Android device on a variety of hardware platforms, including the Nintendo Switch, the PlayStation 4, the Xbox One, and the PC. You can also play games on the TV, using the built-in media player, or by connecting your Android device to a monitor or other display. The app allows you to save your progress at any time and play your games in the same state as when you last stopped them. You can also share your saved game states with other users and play together by using the network play.
The app supports a variety of gamepads and controllers, including the gamepad for the Nintendo Switch, the gamepad for the PlayStation 4, the gamepad for the Xbox One, and the gamepad for the PC. The app also supports a variety of video resolutions, including the standard resolution of 1080p and the ultra-high-resolution mode of 4K.