In December 2017, Apple launched a person-to-person (P2P) money transfer service in the U.S. tied to iPhones and iPads using iOS 11.2 and Apple Watch using watch OS 4.2. Users can access the service by using the Messages app, by asking Siri, Apple’s artificial intelligence, voice-activated personal assistant, or from the Contacts app. There is no need to install an app or create another account. Only other eligible Apple device users can receive a money transfer because all money received is automatically added to a digital-only prepaid Apple Pay Cash Card stored in the Apple Wallet app. App...