Facebook CEO Mark Zuckerberg revealed his plans last year to integrate its chat services WhatsApp, Messenger and photo-sharing app Instagram to let their users message each other across platforms.
Calling it a long-term project, Zuckerberg said the cross-app functionality will happen in 2020 or beyond.
The new feature was spotted by WABetaInfo, a fan website that tracks WhatsApp updates, on Thursday.
"WhatsApp from Facebook is added to the WhatsApp Status for newly registered users!' posted the website.
A follower replied: "This is a feature that they know how to implement faster!"
WhatsApp in September quietly rolled out a feature for Android users to let them share their status stories directly on Facebook Story and other apps.
Just like Instagram, WhatsApp's status stories lets users post images, text and videos on your profile that disappear after 24 hours.
Facebook's video calling device Portal also works with just a WhatsApp account, allowing users to make video calls to friends and family and access features like 'Story Time' even if they don't have a Facebook account.
According to Zuckerberg, more than the commercial benefits of the chat integration between the apps, he was concerned about data encryption.
"The first reason that I'm excited about this is moving more to end-to-end encryption by default in more of our products. People really like this in WhatsApp. I think it's the direction that we should be going in with more things in the future," he told analysts during a conference call.
"There are also a number of cases that we see where people tell us that they want to be able to message across the different services," Zuckerberg noted.
The move could let the social networking giant tout higher user engagement to advertisers, further ramping up its advertising division.
( With inputs from IANS )