https://www.theverge.com/2018/11/28/18115264/google-fi-iphone-android-project-official

Three years after it first launched, Google is making its cell service a little more official today. Project Fi is graduating into something a little more ambitious and getting a new name in the process: Google Fi. But the bigger news is that it’s also going to support more phones — a lot of phones — including the iPhone and “the majority of Android devices.”

This isn’t the first time that Fi has worked with Apple devices; you could get a data-only SIM for iPads as secondary devices before. And technically, a Fi SIM has always worked in an iPhone, provided you adjusted the data settings on the phone. But now Google is supporting iPhones directly for new customers, though it says that the support is in beta and requires “a few extra steps to get set up.” There will be a new Google Fi iOS app to help ease the process along.