Numerous features in Allo have been implemented in Google Messages, like Smart Reply and GIF support, and the Allo team will not focus on the Messages app. SMS and online messaging can't exactly be compared, but we hope that Google is working on something special.
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.
Hangouts will live on as an enterprise tool, while Allo's features are being integrated in the Android messaging app Messages.
The shutdown has been expected for some time.
This year we launched Duo support for iPad, Android Tablet, Chromebook, and Smart Displays, giving you more flexibility to make calls from your favorite devices. Unfortunately, it seems that Google has made the decision to bring down its shutters on the app. Initially released in the year 2016 on 21st September, the app couldn't gain much of popularity and Google has stopped investing in it from April this year. The company's also continuing to develop Hangouts into a workplace collaboration app, helping it to rival the likes of Slack.
Google has struggled with its messaging strategy over the years, with numerous experiments and false starts since Google Talk was launched in 2005. And after that it will be gone.
Incidentally, changes are also afoot as far as Hangouts is concerned, but Google denies that it is going away.
Allo joins Hangouts "Classic" on the scrapheap, after it was revealed that Google is working towards moving people on to the newer Hangouts Meet and Hangouts Chat apps. "We're fully committed to supporting Hangouts users in the meantime", wrote Klainer.
Meanwhile, Google will focus on Messages. On the other hand, Google's video calling app Duo has been doing fairly well, and the completely doesn't plan to stop development on it.