mox

Do these accept cash, or only ATM cards? (The latter would link your transaction to your bank account, of course.)

What do they give? A printout of a wallet address?

I think you mean across the internet, but I get your point. You might want to state that in your post.

Its file sharing feature works between any supported devices, including phone-to-phone, and yes, it is intended for connections across a local network.

Why go through someone’s service when you could go direct?

https://kdeconnect.kde.org/download.html