And its companion app Allo is nowhere to be seen.

Almost exactly three months after announcing Duo back at Google I/O, Google has subtly put up a blog post stating that the new standalone video chat app is hitting the Play Store and rolling out worldwide.

If you needed a refresher on the app (it has definitely been a while), Duo is a simple person-to-person video chat app that's designed to take the fuss and hassle out of making a video call — to make it a more "human" way to communicate. The technology behind Duo is supposed to make calls seamless and fast, even on slower network connections, and a standout feature called "Knock Knock" gives you a glimpse at the other person before you pick up the video call so you know what you're getting into. It's also a cross-platform app, with iOS support from Day 1.

While some are still seeing the old "pre-register" button in Google Play the app is finally available to download for many. The official Duo website is now live as well, albeit with very sparse information and links back to the Google Play Store. Google's blog post indicates that in just a few days it'll be available around the world to let you link up with your friends and family in a more personal way.

More: How to set up and use Google Duo

Interestingly, Duo's companion app, the full-featured chat app Allo, is nowhere to be seen as part of this announcement.