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A Beginner’s Guide to Google Duo and Google Allo

Ben Stegner 15-03-2018

Google has so many apps, services, and projects Google's Most Interesting: Apps, Projects, and Services You Must Know About Google always has dozens of projects going at any given time and it can be hard to keep track of them all. Here are the most interesting ones that you should be aware of. Read More that it’s sometimes hard to get your head around the infinite number of choices available. And while Hangouts was once its premier messaging app, the company added to its repertoire in late 2016 with the release of Allo and Duo.


These two apps serve different functions, but are both handy to have at your disposal. So let’s discuss what both Duo and Allo do and how to start using them!

Google Duo

Google Duo is a straightforward video-calling app, and 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 has replaced it with Duo as the default video chat app on Android. Further, Duo only support one-on-one chats, so there’s no group calling here.

Duo is mobile-only, so while you can talk with other Android or iOS users, there’s no app for calling on your computer. Because of this, your Duo login is tied to your phone number, not your Google account. This makes signing into Duo simple, and you don’t have to know someone’s email address to get ahold of them.

One tap on any of your contacts starts a video call. You can also make audio-only calls if you’d prefer not to show your face. On Pixel, Nexus, and Android One devices, Duo also hooks into the Phone, Contacts, and Messages apps, so you can make video calls from other places on your phone.

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 wants before you start talking.

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.

Download: Google Duo for Android | iOS (Free)

Getting Started With Duo

Download the Google Duo app for Android (it may already be pre-installed) or iOS, then pop it open. Provide your phone number, then you’ll receive a verification code via SMS. Grant the app permission to access your contacts and microphone/camera, then you’re all set to go.

You’ll see suggested contacts on Duo’s home page, along with a live preview of your phone’s front camera. Tap the slider to switch between video and audio calls. Swipe up from the bottom of the screen or tap Contacts to see who’s on Duo.

Google Duo Contacts

You’ll see all your contacts who have Duo installed first. Tap one to start a call. If you scroll past those who use Duo, you’ll see an Invite to Duo section where you can send your friends a message asking them to download the app. You can even call Android users who don’t have the app installed Google Duo Lets You Call People Without the App Google Duo users can now make voice calls or video calls to their contacts using Duo even if the other person has never even heard of this particular messaging app. Read More .

When you receive a Duo call, swipe up to answer it or swipe down to decline. During a call, you can use the Mute button to mute your microphone, and the Camera button to swap between your front and rear cameras.

Finally, tap the three-dot Menu button in Duo to access a few options. You can disable vibration for incoming calls, turn off “Knock Knock,” or let the app use high-quality video even if you’re on mobile data.

Google Duo Settings

Google Allo

While Duo is for video calling, Allo is an instant messaging app. Why use it when WhatsApp and Telegram WhatsApp vs. Telegram: Which Is the Better Messaging App? In the battle for the best messaging app on Android, who takes the cake: WhatsApp or Telegram? Read More , and other options are so popular? Google has a few tricks that it hopes to entice you with.

One of the big draws of Allo is the Smart Reply feature. As you use the app, it learns about your personality and typical responses. Then, when someone sends you a message, you’ll see bubbles at the bottom of the screen that let you reply instantly. These are better than canned messages, though, because they’re based on context.

Another standout feature in Allo is Google Assistant’s integration. You can summon the same Assistant that answers your questions on Android anytime in your chats. Just type @google and you can ask it for directions, information, and anything else you can think of The 15 Most Popular "OK Google" Questions You Can Ask Google can answer a wide range of questions, but which are the most common? The most popular OK Google questions might surprise you. Read More . Allo also includes a dedicated chat with Assistant you can talk to anytime.

Aside from the major features, Allo features a few other perks. Interestingly, you can adjust the size of your messages. Typing in all caps is annoying, so you can slide the Send icon up or down to scale the size of your message text. This lets you “whisper” or “shout” through text.

Allo also lets you doodle on photos when you share them. It also has plenty of stickers to check out. And the Incognito chat feature provides private notifications, encrypted chat, and the ability to have messages expire after a set time.

Download: Google Allo for Android | iOS [No Longer Available] | (Free)

Getting Started With Allo

Install the app, then you’ll need to enter your phone number. You’ll then see a prompt to connect your Google account, which lets you link your existing Google profile info for Google Assistant. Add your name and profile picture, then the app might ask you to invite some of your contacts to Allo. Tap Skip to move on, and you’ll see your chat inbox.

Google Allo Home and Stickers

Tap Start chat to begin a new message. Like Duo, you’ll see a list of people who use Allo first, under Allo contacts. Select one person and then Done for a one-on-one chat, or multiple people (up to 256) for a group chat. If you select Start incognito chat, you can then select one or more folks to talk with incognito.

Once in a chat, you’ll find most of the usual options for sending content above the text field. Tap the icons to send pictures, stickers, GIFs, or share your location. Type @google and then a command for Google Assistant to help you out with.

Google Allo Chatting

If you want, you can also use Allo on the web. But you’ll have to link the app on your Android or iOS device to do so.

Google Allo and Duo: A Great Messaging Combination

Like any messaging apps, whether you use Allo and Duo likely comes down to how many of your friends use them. If everyone you know sticks with Skype, WhatsApp, or another app, you might not get might mileage out of Google’s offerings.

While Duo is a dead-simple video calling experience that’s quite handy, you may have some privacy concerns about Allo. Inviting Google into your private chats is a step we imagine some people won’t be comfortable with, so you may prefer to use a secure messaging app 6 Open Source Messaging Apps More Secure Than Skype Skype has never been the most safe or secure communication protocol, and after Microsoft took over in 2011, concerns over privacy began to pile up. Can these secure, open source alternatives allay those fears? Read More instead.

Explore more about: Instant Messaging, Video Chat / Call.

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  1. 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.

  2. 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.