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- The Google Cardboard app helps you use your phone as a VR device for free.
- The Google Cardboard viewer is no longer available, but the Cardboard site does provide a selection of other affordable viewers, as well as instructions for creating your own cardboard viewer.
- Using the Google Cardboard app also gives you a way to properly format your phone screen for your VR viewer.
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Google Cardboard is the company's affordable answer to a virtual reality (VR) experience: It's a free app that works alongside other VR apps to let users effectively turn their phones into a VR device. They also offer relatively cheap viewer options on the Google Cardboard site, lowering the bar to entry for VR.
Here's how to find Google Cardboard-compatible VR viewers and use the Cardboard app on your iPhone or Android.
What is Google Cardboard
The term "Google Cardboard" can be used to refer to two different things:
- The Google Cardboard app: The app, which can be downloaded for iPhone or Android, helps users launch VR experiences on their device.
- The Google Cardboard VR viewer: This cardboard viewer was made to fit around your smartphone and function like VR goggles. Google has discontinued the device, though they do provide instructions for creating your own cardboard viewer.

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Even though the Google-made viewer isn't available, you can still find similar products from other VR companies through the Google Cardboard site. And those can work alongside the Google Cardboard app.
How Google Cardboard works
To use the Google Cardboard app, you just have to do the following:
1. Download the Google Cardboard app from your phone's app store.

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2. Give the app permission to use your camera.
3. Find the QR code on your viewer and scan it.

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4. Place your phone in your VR viewer device.

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5. Load up your desired VR experience, either within the Cardboard app or through a Cardboard-compatible VR app.
How to get and use Google Cardboard
The VR viewers showcased on the Google Cardboard site range from about $8.95 to $39.95, and are made from cardboard, plastic, and nylon ABS. They can fit screen sizes up to seven inches, depending on the model you purchase.
You can also download Cardboard-compatible VR apps, which can be found within the Cardboard app.

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To use an app in tandem with Cardboard and your viewer, select the View in Cardboard option.

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From there, you should be able to enjoy your VR experience, properly formatted for your viewer.