Tried cash app and not really happy about using it. Switched to use walletano's progressive web app and most of the payments I tried are quite fast (less than 2-3 seconds). Paid to WoS, SN, alby. Payments to Phoenix Wallets seems to be a little slower.

Interesting. How would this work? Also, what about privacy? E-Mail addresses of sender and receiver would be exposed, right?

I use lately Walletano's PWA. It offers both a custodial and a self-custodial wallet. I only tried the custodial one, I might connect my node later. But it's multi wallet, so you can have lots of wallets (custodial and self-custodial together) for different use cases (business or personal).

WoS seems a little faster probably because Walletano is quite new and doesn't have yet too many channels but I like more Walletano's UI.

Plus it was quite easy to setup my LN address the same as my email address.

Will keep you posted as soon as I connect my node.

I don't think so. There might be PWAs that let's you run in offline mode for certain tasks but usually PWAs need internet to start the app.

Wireguard or OpenVPN are your best solutions.

Problem with random nodes are:

Anyone tried this plugin that transform email addresses into Lightning Addresses? https://github.com/Walletano/Walletano-Email-to-Lightning