Google’s Duo is its most popular communications app, and the firm is working at making it more accessible to users.

As per an APK teardown by 9to5Google, the firm is working on letting users sign in to Duo without need for a linked phone number as currently mandated.

While Duo has typically required the user to have a linked phone number, competitors like Facetime and Facebook Messenger don’t. With Duo’s reported rise in popularity, the firm may be angling at improving its appeal with users. If this feature materialises, it will become easier for users without phone numbers to use it. Parents for an example will now be able to hand kids iPod Touches and cheap Android tablets as WIFI only communication devices.

The firm may also be working on multi-account support as per the APK. Though that may be more an extension of Android’s multi-account sign in than support for multiple emails accounts for the same Duo account.

Google Duo is available for users on iOS, Android and the web via a Progressive Web App.