Cardboard is a virtual reality app enabling users to experience VR on smartphones through compatible viewers.

Download Cardboard from Google Play Store and install it by following the on-screen instructions for your Android device.

Upon first launch, follow the setup guide to configure your viewer and explore available VR experiences.

Key features include viewer setup, VR content discovery, developer tools, and community engagement resources.

Customize your experience by adjusting settings like viewer parameters and display preferences in the app menu.

Save favorite VR experiences by bookmarking them within the app or creating custom shortcuts on your device.

Share VR content by using the app's built-in sharing options to post links on social media platforms.

Access detailed information by exploring the app's library or searching for specific VR experiences online.

The app requires camera and storage permissions which can be managed in your device's settings menu.

Check for updates via the Google Play Store and ensure smooth operation by restarting the app periodically.