Apple explains how Apple Pay Cash will function as an electronic purse on iPhone, iPad and Apple Watch

Apple Pay Cash and person to person payments now available — Apple — “Apple customers who don’t already have Apple Pay set up on their supported device can still receive money from friends and family without needing to install a new app or add a card to Wallet. When new users receive money for the first time, it’s simply added to their new Apple Pay Cash card once they accept the terms.”