Google Cardboard is a virtual reality (VR) and augmented reality (AR) platform developed by Google for use with a head mount for a mobile phone. Named for its fold-out cardboard viewer, the platform is intended as a low-cost system to encourage interest and development in VR and AR applications. Users can either build their own viewer from simple, low-cost components using specifications published by Google, or purchase one manufactured by a third-party. The platform was created by David Coz and Damien Henry, Google engineers at the Google Cultural Institute in Paris, in their 20% "Innovation Time Off". It was introduced at the Google I/O 2014 developers conference for Android devices, with a release to iOS at the following year's event. Through January 2016, over 5 million Cardboard viewers had shipped and over 1,000 compatible applications had been published.