I wonder you can use your an external lightning wallet in primal? I consider to be a premium member if that’s possible.  

 YOU CAN RECEIVE TO ANY LIGHTNING WALLET.

ON ANDROID YOU CAN ZAP FROM AN EXTERNAL WALLET BUT NOT ON IOS. 

 ANDROID MASTER RACE FREE YOURSELVES FROM THE FRUITY OVERLORDS OF JOBS 

 That’s bummer. I stuck in Apple Ecosystem.