Apps similar to Side Screen include Spacedesk, which has a free version. Other options are Deskreen, Duet Display, Tab Display and Weylus. You can choose from more than 10 Screen Mirroring Apps like Side Screen for iPad, Mac, Windows, iPhone and Android.
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.
Germany
EU
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.
United States
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)
United States
GlideX is a cross-device screen-sharing solution. Using wired or wireless connections, you can create a bigger and better work or play space. GlideX optimizes your workflow in the blink of an eye!
Taiwan
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.
China
Smart devices become monitors by connecting them to a PC via USB! The Convenient Connect TwomonUSB
United Kingdom
Turn any Mac you already own — even an old iMac — into a true extended second display for your Mac. No dongle, no subscription, no account, no cloud.
ItalyEU
MirrorHall creates virtual second monitors over the network using UDP video streaming among Linux desktop or mobile devices. It is optimized for low latency, and is based on gstreamer and GNOME's mutter screen sharing APIs.
Make your iPad/tablet/computer into a secondary monitor on Linux. - GitHub - kbumsik/VirtScreen: Make your iPad/tablet/computer into a secondary monitor on Linux.
A high-performance, low-latency drawing tablet solution that turns your Android device into a professional graphics tablet for Linux (Wayland).
South Africa
Uses local Wi-Fi, Ethernet, or Thunderbolt Bridge to add a Mac, Windows PC, or Android device as extra Mac desktop space, or mirror screens on supported computers. It is free, needs no account, subscription, dongle, or cloud relay, and is for trusted networks.
Taiwan
BetterCast lets you use your old device (Mac, Android, iPhone) as real extended displays with zero subscriptions, zero cloud, and native macOS performance.
Philippines
