Air Display is described as 'Use your iPad as a wireless display, to extend your Mac desktop. Ever wish you had an extra display for your computer? There’s an app for that! With Air Display, you can use your iPad as an additional monitor for your Mac (Windows no longer supported)' and is a screen mirroring app in the remote work & education category. There are more than 25 alternatives to Air Display for a variety of platforms, including Mac, Windows, iPad, Android and iPhone apps. The best Air Display alternative is Spacedesk, which is free. Other great apps like Air Display are Deskreen, Tab Display, Side Screen and Duet Display.
Utilize Spacedesk to transform any network-connected device, from Android tablets to iOS devices, into additional monitors. Requires a Windows primary machine for efficient screen sharing, perfect for office or remote collaboration.
Enables any device with a browser to act as a second screen for computers, featuring secure end-to-end encrypted streaming, entire screen or app sharing, multi-device connections, cross-platform support, advanced video quality controls, and easy WiFi setup.
Allows extension of a Mac or Windows workspace to iPad, Android, macOS, or Windows devices as portable second screens, supporting multiple connections, wireless linking, cross-platform use, and practical multitasking like separating documents, chat, or meetings.
Transforms any Android tablet into a Mac's second monitor using USB-C for low latency or WiFi with QR pairing, featuring H.265 hardware streaming, touch input, HiDPI support, lightweight design, Gaming Mode, open-source customization, and virtual display window management.
Turns iOS or Android devices into efficient second displays or graphics tablets for Mac and PC, delivering zero-lag, high-resolution output with touch, gesture, and touch bar support, hardware-free setup, secure remote desktop capabilities, and end-to-end encryption.
Transforms tablets or smartphones into graphic tablets or touchscreens for computers, enabling mouse control, screen mirroring, hardware video encoding, keyboard input, stylus support with pressure and tilt on Linux, multi-touch, window capture, and use as a second screen.
Screen Stream over HTTP allows viewing the device screen in your web browser. No need of any additional software except for this app and a web browser. No annoying ads or pop-ups. The application works via WiFi and/or 3G/LTE network. It uses MJPEG to encode screen images and send.
Enables tablets to function as HDMI monitors for external devices such as cameras, gaming consoles, and VHS. Features AI-powered upscaling for sharper visuals, CRT emulation for retro games, image adjustments, screenshot sharing, and portable use.
Transforms a tablet or smartphone into an additional wired display using USB for Windows or Mac, enabling high-performance multitasking, touch control, auto landscape or portrait mode switching, support for creative and office apps, and secure connectivity.
CamX - USB Camera is a multifunctional iOS app that converts your device into a portable video capture tool, capable of recording from various sources, and can also serve as a gaming console display or secondary screen.
Transforms an iPad into a professional drawing tablet for Mac and PC, featuring customizable shortcuts, Magic Gestures, pressure sensitivity with selectable curves, hover support for new pencils, quick keys, and seamless wireless or wired connectivity for artists.
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I like Deskreen as an alternative to Air Display because it is fast, free and open source. And has wifi support too!