PS-S1: App installs and runs without crashing
App installs on a Daydream-ready phone. It does not crash, force close, freeze, or otherwise function abnormally.
PS-P1: App loads quickly or provides feedback in VR to the user if the app takes longer than three seconds to load
We recommend using a head-tracked VR splash screen whenever possible. Adding sound is useful feedback to communicate that your app is loading.
Unity app developers can set a VR splah screen using Player Settings > Android > Splash Image > Virtual Reality Splash Image.
Your app must not use a static image without head tracking. Your app must not use sound in place of a splash screen; this lack of feedback leads users to infer that something is broken or stalled.
PS-P2: App maintains high performance
The app renders at a consistently high frame rate and sustains low headset motion-to-photon latency. Low motion-to-photon latency is achieved through proper usage of the Google VR SDK to enable asynchronous reprojection.
Apps should not cause visible frame drops, screen tearing, or black bars on the side of the application due to missed frames.
An example of an application which qualifies in 3DoF:
- Targets running at least 60fps (without relying on reprojection) with 2 sigma confidence over a 30 minute play session. on a reference Daydream ready phone. The reference phone for 2018 is the Google Pixel XL (2016).
An example of an application which qualifies in 6DoF head tracking (for either optional OR required):
- Targets running at least 75fps (without relying on reprojection) with 2 sigma confidence over a 30 minute play session. on a reference Daydream Standalone Headset. The reference standalone for 2018 is the Lenovo Mirage Solo.
The performance criteria specified above is not exhaustive.
PS-P3: App does not display a thermal warning during 30 minutes of usage
Your app must not hit the device’s thermal limit resulting in a warning message displayed to users during the course of a 30-minute play session.
PS-V1: App renders without unexpected distortion when viewed through a Daydream viewer
If you are correctly using the Google VR SDKs with a 3D engine to render your content, this is handled for you. Be extra careful with other (pre-rendered) assets like VR video or panoramic images, because errors can be introduced during capture or processing.