ALVR - Air Light VR is described as 'ALVR streams VR display output from your PC to Gear VR / Oculus Go via Wi-Fi. This is similar to Riftcat or Trinus VR, but our purpose is optimization for Gear VR. ALVR provides smooth head-tracking compared to other apps in a Wi-Fi environment using Asynchronous Timewarp' and is an app in the Gaming Software category. There are four alternatives to ALVR - Air Light VR for a variety of platforms, including Windows, Android, HTC Vive, Oculus Rift and Steam. The best alternative is VRidge, which is free. Other great apps like ALVR - Air Light VR are Virtual Desktop (Paid), TrinusVR (Freemium) and Phone VR (Free Personal, Open Source).
Virtual Desktop is an application developed for the Oculus Rift / Rift S, HTC Vive, Valve Index and WMR headsets that lets you use your computer in VR. You can browse the web, watch movies, Netflix or even play games on a giant virtual screen.
Use Steam VR-enabled applications with your phone as HMD (Head-mounted display). The only Open-Source solution to similar commercial packages like VRidge, Riftcat, Trinus etc etc. (https://github.com/ShootingKing-AM/PhoneVR).