Google provides developers with two virtual reality (VR) platforms: Cardboard, the world's most popular and accessible mobile VR platform, and Daydream, a new platform for low-latency, immersive, and interactive mobile VR. The Google VR SDKs include everything you need to develop for these platforms, including libraries, API documentation, developer samples, and design guidelines.
Daydream is a platform for high quality, mobile virtual reality. Daydream provides rich, responsive, and immersive experiences with hardware and software built for VR.
Cardboard lets you experience virtual reality in a simple, fun, and affordable way. Cardboard is built for bite-size VR experiences and works with almost any smartphone on Android or iOS.