WireGuard

Well, it does connect and work but I feel it runs in a very hidden manner. No permanent notification, no status bar icon. Also, the connection process is completely hidden so you have no idea if it is connecting at all until the toggle switch suddenly turns green. I understand the minimalist approach but this app is a step too far, I will look for an alternative.

Such a shame that this is the face of wireguard to the world. It works well but user experience is abysmal. Absolutely zero useful feedback in the UI on a failed tunnel connection, it will actively mislead the user by displaying a "VPN connected" status even if configured with a completely invalid server. What's even more infuriating is the logs don't contain any useful information in case of connection failure (but they seem to have a lot of noise about every insignificant UI action)

Wire guard changed the VPN world for the best. It's a very good and reliable protocol and I've never had issues with the official client on Android. The kill switch works and it's not leaking anything (including DNS). It constantly tries to reconnect automatically and it keeps trying until the tunnel is re-established which is incredibly useful while I'm driving and going through tunnels. Hopefully one day wire guard will be integrated directly in Android, but until then this app will suffice.