ecash wallets like minibits and enuts have had nostr contacts from the start which has been awesome. You can send ecash to any npub via nostr dm. You can redeem ecash tokens into any ecash wallet you want. Check out macadamia on ios for a really simple ux

minibits is special and another reason to use android for nostr. It has an ln bridge which gives users an ln address that receives zaps directly as ecash in wallet. It also works as a zapping wallet without any need to setup nwc. Hit zap and minibits opens automatically to one tap approve.

npub.cash works fantastic for receiving zaps but no ios use for sending zaps.