iDisplay is described as 'Turn your iPad/iPhone or Android tablet or smartphone into a convenient side monitor for your Windows or Mac desktop. iDisplay is a universal app specially optimized for iPad, iPhone, iPod Touch, and Android devices screens' and is a screen mirroring app in the education & reference category. There are more than 10 alternatives to iDisplay for a variety of platforms, including Mac, Windows, iPad, iPhone and Android apps. The best iDisplay alternative is Spacedesk, which is free. Other great apps like iDisplay are Chrome Remote Desktop, Deskreen, Duet Display and Side Screen.
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.
Chrome Remote Desktop allows users to remotely access another computer through Chrome browser or a Chromebook. Computers can be made available on an short-term basis for scenarios such as ad hoc remote support, or on a more long-term basis for remote access to your applications...
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.
I like Deskreen as an alternative to iDisplay because it is free, fast and open source! And it has support for wifi too!
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.
Frequently loses connection over wifi for no reason.
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.
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 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.
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.
Uses local USB connection, no need to be on a network.
It's has nearly the same specifications but isn't that expensive.
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.
Converts a tablet or computer into a wireless, low-latency secondary display for Mac or PC with USB-C/HDMI connectivity, touch, Apple Pencil, and keyboard support. Offers multiple modes, high-quality images at 60 fps, and integrates with drawing applications for versatility.
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)
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Spacedesk works much better than iDisplay even though it's free. The only problem is that spacedesk is Windows ONLY.