Access and control your Mac from anywhere. Modern remote desktop for Mac, iPad, and iPhone.




Duet Display is described as 'Transforms tablets or smartphones into a low-latency, high-res second screen or graphics tablet for Mac and PC, with secure remote access and touch support' and is a popular Remote Desktop tool in the os & utilities category. There are more than 25 alternatives to Duet Display for a variety of platforms, including Mac, iPad, Windows, iPhone and Android apps. The best Duet Display alternative is TeamViewer. It's not free, so if you're looking for a free alternative, you could try TeamViewer or RustDesk. Other great apps like Duet Display are AnyDesk, Air Display, LogMeIn Resolve and NoMachine.
Access and control your Mac from anywhere. Modern remote desktop for Mac, iPad, and iPhone.




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.




Remote control and support tool for Windows offering screen monitoring, chat, and file transfer, allowing users to assist clients, share files, manage multiple sessions, while partners oversee and manage permissions during support.




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.




Luna requires a proprietary adapter from them.


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.




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.




Smart devices become monitors by connecting them to a PC via USB! The Convenient Connect TwomonUSB




Yam Display turns your iPad/iPhone into an external monitor for your Mac. Wired by USB, browse documents or watch videos without delay. Touch your Mac and pinch to zoom on beautiful retina display. For multitasking enabled iPads, you can utilize every single pixel of your screen...




Enables iPad functionality as a console or HDMI monitor using UVC capture cards, featuring AI-powered super resolution, dynamic color filters, adjustable resolution and frame rate, real-time diagnostics, and a fullscreen interface for gaming or media.




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.

The Android app is not available anymore, and it seems the desktop app hasn't worked well for years. The iOS app was last updated in 2017, so you might want to avoid it.
It works as long as the computer you are trying to extend and the Apple/Android device is connected to the same WiFi network. The downside is that it is not as smooth than duet display (but iDisplay is wireless nonetheless)


Genki Studio is a software that turns your iPad into a portable monitor and video capture device. It connects to a Genki ShadowCast or any USB UVC device, with features like external monitor support, Apple Pencil markup, and multitasking.




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.



