The same meetings, without a browser tab in the way.
Windows will warn you the first time. The app is not signed with a commercial certificate yet, so SmartScreen shows "Windows protected your PC". Click More info, then Run anyway. That warning is about the certificate, not about anything the installer does.
It installs for you alone and needs no administrator password.
The portable build runs from the file itself and writes nothing to Program Files: OptiTide-Meet-1.0.2-portable.exe.
SHA-256, which you can confirm with
Get-FileHash <file> in PowerShell:
Setup — 1d1bd4daa0a6825d4d051ae4885793022ee40e450977f0704492559ad3e8b652
Portable — a1a6bd78f1455dff688778b3aa2053b59395cc8acb0295c3307c843704ced8ce