Also me trying to zap using an iPhone. 

 What is a good alternative to “Wallet of Satoshi?” 

 Alby 

 80% of users' reports "ZAPPING DOESN'T WORK"
come simply from not setting up your lightning address in Nostr profile

Get Alby.

nostr:note1epwnsyhm2f3wrtyhg4mtmdmu5gqdtw5thu4u937363f6rlcjk44q72avfz