http://www.techradar.com/news/apple-pay-cash-is-now-available-in-the-ios-112-public-beta

Back in September we were a little bummed to learn that iOS 11 was launching without Apple Pay Cash, Apple's peer-to-peer Venmo competitor that lets you send cash to friends.

As TechCrunch reports, though, the service is now available through the iOS 11.2 beta, but both you and the person you're sending money to will have to have the public beta installed on your iOS device in order for Apple Pay Cash to work. For now, at least, the service only works for US iOS customers.