Allo and Duo will inherit new features like other messaging apps

Google would now give an audio-only option to its Duo-video calls service to help their users to communicate using poor-quality internet connections, and was also adding a feature that permits file sharing in group chats on Allo messaging app.
Google launched its video calling app Duo in August providing video calls to users on Android and iOS, competing agains against Skype, Apple‘s FaceTime and Facebook’s Messenger.

Google said that audio calls on Duo will be available from Wednesday in Brazil, and will be soon rolled out to users all around the world, in the next coming days.

The audio calls will work well on all types of connection speeds and will be data efficient, Google’s Vice President (product management) Mario Queiroz said in a blog post.
With over 139 million people online, Brazil ranks among top five internet populations throughout the world.

In response to many requests from users from countries like Brazil, Google announced that Android users will now be able to share docs and other files ( .apk, .zip,.pdf, .docs, and mp3) with their friends in group chats.