From the official blog post: “Allo will continue to work through March 2019 and until then, you’ll be able to export all of your existing conversation history

From the official blog post: “Allo will continue to work through March 2019 and until then, you’ll be able to export all of your existing conversation history from the app—here are instructions on how to do so.” That’s not terrible, but the bar is very low for this kind of thing. It’s hardly seamless.