Now, Google says to continue Messages' momentum it has decided to "stop supporting Allo to focus on Messages." Many of Allo's features have already been integrated into Messages, and Allo will continue to work through March 2019. Until then, users will be able to export all existing conversations from the app. Because Google's main Messages app isn't available on iOS, Allo users on iPhone will have to migrate to an alternative texting platform when the service shutters.
Google Allo first launched in September 2016, pitched as the company's "intelligent messaging app," thanks to the inclusion of Google Assistant. Allo is available on iOS and Android smartphones, and offers many features that are comparable to messaging apps like Apple's iMessage and Facebook's WhatsApp.