Best TwomonUSB Alternatives & Competitors in 2025

With Duet Display, you can transform your iPhone or iPad into a second display to expand the screen space of your PC or Mac system.

spacedesk expands the Windows desktop computer screen to other computers over the local area...

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iDisplay is an app that turns a mobile device into a secondary desktop monitor. The app currently supports iOS, Android, Windows and MacOS, and it lets users connect a desktop computer to a mobile device over WiFi. Read more about iDisplay.

Use Splashtop Wired XDisplay to turn your iPad, Android tablet, Kindle or smartphone into a high-performance extra monitor for your computer.

Air Display allows extra screens to extend the display size of a Mac desktop. The company behind the product is Avatron Software, which was founded in 2008. Read more about Air Display.

Use your tablet as graphic tablet/touch screen on your computer.

Hardware that turns the iPad into a wireless second display

DisplayPad is an online cutting edge solution that designed to use your iPad as a second or extra display for your Mac device.

Yam Display turns your iPad or iPhone into an external display for your Mac via USB.

Allows using a tablet device with stylus or digitizer input in the same way as a dedicated wireless tablet. Use your phone or tablet as a Wacom device essentially.

Superbrush clones the screen of your Windows computer on your Android tablet and relays pen input back to your PC.

Astropad is a free form drawing tool designed from the ground up to take advantages of the features offered by an iPad.

Barrier is a cross-platform software for sharing your mouse and keyboard between multiple computers...