Universal Control is coming in macOS Monterey, but you can use any device as a second monitor right now with the right software or accessories.

spacedesk is a free app that lets you use an Android tablet as a second display for your Windows PC. Learn how to set up and use it.

The idea of an Android tablet with HDMI is especially befitting of the platform. It’s a full-functioning tablet that’s handy as a second screen and can perform double duty across all sorts of ...

Duet Display lets you use any Android device as a second screen for your Mac, whether wired or wireless, giving you extra space for multitasking.

The Lenovo Yoga Pad Pro is something of an unusual Android tablet, featuring an HDMI input to use it as a monitor ...