If you’re in USA and you still have it, I’d recommend you move it while you can. 
Discussion
Aren’t they back in the AppStore
I haven’t looked. I moved my sats and left just a few and was getting some zappertizing sats here and there. Decided to check a few weeks back and this was a what I got. They moved me off of TestFlight a month before the pulled out of the AppStore so idk what it says what it says. They did good things for lightning but abandoned the US market. I wouldn’t trust it will work anymore.
I was never on TestFlight and disabled AppStore auto updates, so I still have mine. Sent out some sats the other day and received some sats 42 minutes ago. Can confirm it still functions if you have it on your phone, but can’t say for how long.