Is your feature request related to a problem? Please describe.
I'm using tunnel for selected apps on phone to connect home private cloud servers with lan address. The ss server is installed on a router with DDNS setup. The WAN connection on router was with dynamic IP.
The tunnel was inaccessible every time WAN IP changes.

Describe the solution you'd like
Would be nice if there's an option optimized for connect ss servers with DDNS.

Describe alternatives you've considered
Force DNS resolve every n seconds.
Kill and restart the android client app with some task manager while DNS change detected. Need an option to start selected profile on app start.