A focused remote window
Choose an application from the viewer and MacReacher captures its window rather than a complete monitor. On another Mac, the streamed app can live in its own native client window; on a phone it can use the available screen.
Live Simulator workflow
Run iOS Simulator or an Android emulator on the host Mac, select it from the remote app switcher and interact with the live window. This is remote control of the Mac's simulator—not a substitute for a signed device build, TestFlight validation or testing on physical hardware.
Switch without returning to the desktop
The app switcher can list and launch Mac applications, while a window-cycle control handles apps with more than one window.
Privacy boundary
Single-app mode reduces what the viewer displays, but it is not an operating-system data-loss-prevention boundary. Notifications, sheets or other content belonging to that app may still appear.