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Be together
in the moment.Get closer to everyone you love with simple, high-quality video calling on iOS and Android.
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Get closer to everyone you love with simple, high-quality video calling on iOS and Android.
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Face to face
with just a tap.Simple one-tap calling and super smooth switching from cell to WiFi make it easy to check in from anywhere.
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Simple one-tap calling and super smooth switching from cell to WiFi make it easy to check in from anywhere.
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See what’s up
before you answer.Preview incoming video calls from everyone in your contacts with Knock Knock. So whether it's your mom's first skydiving trip or your friend's shiny new ring, you'll never miss a moment.*
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Get a video preview of incoming calls from your contacts with Knock Knock—so you can see who’s calling and why before you pick up.*
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See what Duo can do.Download now.
*Incoming calls on iOS will not automatically show the Knock Knock preview when the app is not open.
Apple, the Apple logo and iPhone are trademarks of Apple Inc., registered in the U.S. and other countries. App Store is a service mark of Apple Inc. © 2016 Samsung Telecommunications America, LLC. Samsung and Galaxy S are both registered trademarks of Samsung Electronics Co., Ltd.
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the video
*Incoming calls on iOS will not automatically show the Knock Knock preview when the app is not open.
Apple, the Apple logo and iPhone are trademarks of Apple Inc., registered in the U.S. and other countries. App Store is a service mark of Apple Inc. © 2016 Samsung Telecommunications America, LLC. Samsung and Galaxy S are both registered trademarks of Samsung Electronics Co., Ltd.