You can use any phone or tablet as a secondary display on Windows. This can be helpful if you want to increase your productivity or if you want to use your phone or tablet as a second monitor.

Hook up an Android tablet to your computer as an easy alternative to buying a second screen, with this handy guide.

Sidecar in macOS turns your iPad into a second display, but it's limited to certain Macs and iPads. Thankfully, a few ...

There's a new app in town that lets you use an iPad as a second monitor for a Mac. It connects over USB for smooth operation good enough for the enterprise.

The power of two: Using your iPad as a second monitor Performance lag and color accuracy issues make this a less-than-ideal solution.

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.

But you can use your tablet to improve your productivity, too. Since a tablet is essentially a portable touchscreen, why not repurpose it during work hours as a secondary display?