radialapps

No idea what that is

No

It's free

Everything can be mostly configured through the admin panel, maybe 15-20 minutes?

There's a mobile app for Android: https://play.google.com/store/apps/details?id=gallery.memori...

On iOS, you can use the PWA ("add to homescreen") and it behaves almost exactly as a native app

There is an Android app, not for iOS yet. https://play.google.com/store/apps/details?id=gallery.memori...

Indeed. Backward compatibility is also a major goal and there have been almost no major breaking changes since v2 (at v7 currently)

Yes. Yes.

You can share folders and albums that don't need an account to view. Folders do support password protection as well.

Face recognition is a hard task but you can manually correct the AI and it learns from that. Performance is the #1 goal here. I actually profiled this side-by-side and it's actually faster than Google Photos for my personal deployment.