I have been writing a lot about this Raspberry Pi iPad server project and Mosh pretty much seemed purpose-built to solve the “ssh on a mobile device that hates background processes and open connections” problem.
I was doing some clever shit with screen, but I gave mosh a go and it’s dead simple to configure and use with blink.
You literally just install the mosh server on the Pi:
sudo apt install mosh
And the Mosh client is built right into Blink, which is cool. I guess.