Social Media

A Beginner’s Guide to Google Duo and Google Allo

Ben Stegner Updated 16-04-2020

Google has so many apps and services that it’s tough to keep track of them all. While Hangouts was once its premier messaging app, in 2016, the company added two new messaging apps in the form of Google Duo and Google Allo.


Google Allo is no longer with us, illustrating Google’s tendency to kill off apps not long after they launch. However, Google Duo is very much still a thing.

In this article, we explain how to use Google Duo, and detail what Google Allo was before its demise.

What Is Google Duo?

Google Duo is a straightforward video calling app that serves as the closest alternative to FaceTime for Android Here's Why You Won't Get FaceTime for Android FaceTime is Apple's video calling service, but can you get FaceTime for Android? What is the Android version of FaceTime? Read More . While Hangouts supports video calling as well, Google Duo has replaced it as the default video chat app on Android.

Another important difference is that while Hangouts is tied to your Google account, Duo uses your phone number. This makes signing into Duo simple, as you don’t have to know someone’s email address to reach them. If they’re in your contacts and use Duo, that’s all you need to call them.

Duo is available for Android and iOS, as well as a web app, at no cost.


Download: Google Duo for Android | iOS (Free)
Visit: Google Duo for Web (Free)

How Does Google Duo Work?

Using the Google Duo app is simple: just tap on any of your contacts to start a call. You can also make audio-only calls if you’d prefer not to show your face. If you use Google’s Phone, Contacts, or Messages apps on Android, it’s easy to call contacts with Duo using shortcuts in those apps. Plus, you can ask Google Assistant to call someone for you.

The only real standout feature of Duo is “Knock Knock,” which lets you see a live preview of the person calling you before you accept the call. Google says this is “[t]o make calls feel more like an invitation rather than an interruption” and gives you an idea of what someone is up to before you start talking.

Finally, Google Duo features a low-light mode to help improve call conditions when it’s dark.


That’s really all there is to it; Google didn’t add many frills to Duo. It’s optimized for low-quality networks and switches between Wi-Fi and mobile data automatically, so you shouldn’t experience many interruptions. It also protects calls with end-to-end encryption.

How to Use Google Duo: Getting Started

To begin, download the Google Duo app for Android or iOS, or visit the Google Duo web app. After opening it, you’ll need to provide your phone number, then you’ll receive a verification code via SMS. Grant the app permission to access your contacts, microphone, and camera, then you’re all set to go.

On Duo’s homepage, you’ll see a live preview of your phone’s front camera and suggested contacts. Tap the Search contacts box to find someone you want to call, or dial their number manually with the keypad icon.

If you prefer, you can scroll through the list of your contacts that are on Duo instead. You’ll see who has Duo installed first; tap one to start a call. If you scroll past those who already use Duo, you’ll see an Invite to Duo section where you can send your friends a message asking them to download the app.


When you tap a contact to start a call, you’ll see three options. Video call is the default and the main feature of Duo. However, you also have the option of a Voice call or Message. This is great if you don’t want to show your face, or just want to record a quick note for the other person. Notes can be video, voice, or text-based.

Once you make a selection, you’ll call them. If they don’t pick up, you’ll have the option to leave a message.


How to Use Duo: Groups and Calling

In addition to one-to-one calls, Duo also supports group calling for up to 12 people. To use this, tap Create group above your list of contacts. Add up to 11 people, then you can start a video call with all of them.

When you create the group, Duo asks you to give the group a name to save it. After you do this, you’ll see the group appear in your list of contacts in Duo. This lets you easily start a new group chat with the same people in the future.

When you receive a Duo call, swipe up to answer it or swipe down to decline. During a call, like most video chat apps, you’ll see a Mute button to mute your own microphone. The Camera button swaps between your front and rear cameras. And you can use the Effects to turn yourself into various animals and creatures.

Duo has a few other neat tricks available during a call, but they’re unfortunately only available on the Pixel 4 at the time of writing. Tap Auto-framing and your camera will attempt to keep you centered in the video. Portrait, like the portrait mode in many camera apps, will blur your background to help you stand out.

Changing Duo Options

On Duo’s homepage, tap the three-dot Menu button to access a few options. Select Call settings to disable the Knock Knock, Low Light, or Data Saving modes. Tap Blocked users to block numbers from calling you in Duo.

Finally, choose Account and you can remove Duo from your Google account.

What Was Google Allo?

Shortly after Google released Duo in late 2016, the company followed with a smart messaging app called Allo. Unfortunately, in March 2019, the company discontinued Google Allo.

One of the big draws of Allo was the Smart Reply feature. The app learned the way you talk over time, then showed bubbles at the bottom of the screen with suggested responses.

Another standout feature of Allo was the Google Assistant integration. At the time, this was a big deal, as Google Assistant debuted in Allo before it was available on all Android and iOS devices as it is now. By typing @google, you could ask the Assistant for directions, information, and other details that you and your chat partner would both see.

Aside from these major features, Allo allowed you to adjust the size of your messages to “whisper” or “shout” through text. While it had an Incognito chat feature for private notifications, encrypted chat, and the ability to have messages expire after a set time, Allo came under fire for its poor privacy practices. Experts recommended avoiding it, as Google stored all messages exchanged on the service.

Google now recommends using the Google Messages app on Android as an alternative. However, this is an SMS app, not an instant messaging solution. So we recommend free chat apps like Telegram or WhatsApp 7 Free Chat Apps for Messaging on Your Phone or Computer Want to send messages from your phone and PC? Use these free chat apps to continue the conversation wherever you go! Read More , which most of your friends probably use already.

Google Allo Is Gone, But Google Duo Still Rocks

Google Duo is a handy video calling app because it’s simple to use and works across multiple platforms. Android users likely have it installed by default, and those with an iPhone can set it up easily to chat with Android owners.

While Allo didn’t last, it did introduce the world to Google Assistant. And here’s everything you need to know about Google Assistant What Is Google Assistant and How to Use It Google Assistant is a powerful voice assistant for Android and iOS. Here's what it can do and why you should start using it. Read More .

Related topics: Instant Messaging, Video Chat.

Affiliate Disclosure: By buying the products we recommend, you help keep the site alive. Read more.

Whatsapp Pinterest

Leave a Reply

Your email address will not be published. Required fields are marked *

  1. Kevin Ford
    June 16, 2020 at 5:57 pm

    One can have Duo on your phone and on another Display such as Lenovo Smart Display or a Google one or an Android computer or in fact any computer with the software. An incoming call triggers all the devices Mobile, Lenovo Display, Android, non Android laptop All the devices that are on will suddenly shout that they have a call and there seems no way shut each one up while you choose the one you prefer.

  2. Ben
    March 18, 2019 at 2:52 pm

    Why are you talking about Google Allo when Google is getting rid of it in a few weeks?

    • Ben Stegner
      March 18, 2019 at 2:58 pm

      This article was published a year ago, so we had no idea that Google would be retiring it around now.

  3. VicN
    March 16, 2018 at 12:07 am

    I for one hope that Hangouts is not being abandoned.
    My daughter-in-law has had Apple phones for years , but now sees the error of her ways :-) Her problem is that her daughter has an iPad Mini which she uses to contact her Mum on Facetime if she is in a friends house (sleepovers etc.). The daughter is considered too young to have a phone. Grandad (me) gets the job of finding a compatible app. The only app that I can find is Hangouts , linked to her email address. Everything else is linked to the phone that she does not have. Anyone know of another app to use to communicate between Mum's new Android phone and the iPad ???

    • Mayfair
      March 16, 2018 at 3:35 am

      Have you tried Skype?

    • Ian
      March 16, 2018 at 8:26 am
    • Ben Stegner
      March 16, 2018 at 2:05 pm

      I don't think Hangouts will disappear, but with Google, you really never know.

      There are plenty of apps that will let your daughter-in-law communicate with her daughter. If she wants to use video calling, try Duo, discussed in this article. If they just want instant messaging, Telegram is a great choice and works on Android and iPhone/iPad:

      • VicN
        March 20, 2018 at 11:25 pm

        As I said , daughter-in-law has an iPhone. Getting her phone to last the day is already a problem. To use Skype in this situation means keeping it open in the background and it kills a battery.
        Thanks anyway ,

      • VicN
        March 20, 2018 at 11:30 pm

        I do not know anything about Telegram (will check it out) , but my whole point in the post is that most others need a link to a phone. That includes Duo.
        Have I missed something here ????

        • Ben Stegner
          March 21, 2018 at 12:10 am

          I'm sorry, Vic. I misread your message when I responded. You're right, Duo does need a phone number so it won't workyou're her usage.

          Telegram is an instant messaging app, but it does include voice calling (at least on the iPhone app). It doesn't include video calling. However, Telegram needs a phone number for signing in too.

          It seems that Hangouts is the best app for your family's needs right now. Skype would work too, as you can sign up with just an email address. I'm not aware of Skype draining any more battery than Hangouts or similar apps.

    • Bill
      March 19, 2018 at 7:31 pm

      You are naive if you think preventing her from having a phone would make a difference.

      • VicN
        March 20, 2018 at 11:37 pm

        What on earth is that comment about ???

        You have no idea what age my grand-daughter is !
        Which means that you have no basis on which to make that comment.
        That does not stop you , obviously.
        Says it all about you.