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

Whichever app you try, using your iPad or Android tablet to extend your screen might boost your productivity. Or, of course, you could use the tablet on its own as a productivity-boosting tool.

Use Your Smartphone or Tablet as a Secondary Monitor on Windows Multitasking is pretty easy on Windows, but it gets even better when you have a secondary display to split up your tasks even better.

The Galaxy Tab S11 series upgrades Samsung DeX with the ability to use the tablet screen as a second DeX monitor, giving ...

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

Choose your computer from the list and enter your PIN, and you can begin using your new tablet monitor as you would any external monitor.

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.

These apps can turn your iPad or Android tablet into a second monitor for your Mac or PC desktop.

The best assurance we can offer is that -- barring any new, sophisticated hacking methods -- using your phone as a baby monitor might be the safest option yet.