Here’s how Google Fi will work with iPhones(theverge.com)
theverge.com
Here’s how Google Fi will work with iPhones
https://www.theverge.com/2018/11/28/18116333/google-project-fi-apple-iphone
https://www.theverge.com/2018/11/28/18116333/google-project-fi-apple-iphone
That's worse than a standard T-Mobile plan, which I'm currently on. I don't see any reason to switch.
Unrelatedly, The Verge's link to the iOS app goes through something called "go.redirectingat.com", which fails because it's on my tracking server blacklist. Seems pretty sketch.