How to use the Google Cardboard virtual reality app with compatible viewers

The Google Cardboard app lets you use your phone into a VR device, and it's available for free and is designed to work with ...
GameSpot

Google Announces Cheap and Accessible Virtual Reality App Named Cardboard

Google has announced its foray into the smartphone virtual reality space with an app named Cardboard. The app is described as a "no-frills enclosure that transforms a phone into a basic VR headset".
Los Angeles Times

Google Cardboard says it’s shipped five million virtual reality viewers

With its flimsy cardboard viewers, no one could ever mistake Google Cardboard’s virtual reality experience for the high-octane Oculus Rift or the soon-to-be-released Sony Playstation VR headset. And ...
MacRumors

Google Announces Cardboard SDK for iOS, 'VR View' Feature for Apps and Websites

Google today announced the launch of a Cardboard SDK for iOS developers, allowing them to more easily create native iPhone apps and experiences that will work with the Google Cardboard virtual reality ...