Google Duo is the highest quality video calling app*. It’s simple, reliable, and works across Android and iOS phones and tablets, smart devices, and on the web.


Features:

Make calls between Android and iOS
Whether you’re on your phone, tablet, or on the web, you can stay in touch with Duo. You can also share and join group calls with just a link.

Group call with up to 32 people
Bring together all the people who matter most, even when you're apart, with group calling. Duo now supports 32 people in group video calls.

Bring everyone together with Family mode**
Doodle on video calls and surprise loved ones with fun masks and effects that transform you into astronauts, cats and more.\
Capture special moments
Take photos of your video calls to capture any moment and share it automatically with everyone on the call.

Send video and voice messages, photos, and more
Short on time or your friends can’t pick up? Leave a personalized video message with fun effects, or share voice messages, photos, notes, and emojis.

Low Light Mode
Duo lets you make video calls even in poor lighting conditions.

Voice calling
Make voice-only calls to your friends when you can’t chat over video.

*Based on Signals Research Group technical study comparing video degradation time over 3G, LTE, and WiFi.

**Requires sign-in with a Google account.

***Data charges may apply. Check your carrier for details.

****Specific feature availability may vary based on device specifications.

*****If your Android TV does not have a built-in camera, you will need to connect a USB camera and microphone to your Android TV device.

******Duo works on Android TV devices with Android 8.0 or higher.

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Source: https://play.google.com/store/apps/details?id=com.google.android.apps.tachyon