android - Google cardboard application - small screen -

i try create simple vr application using unity + google cardboard sdk.

i install cardboard unity package , import unity project. click update stereo cameras , drag stereo controller camera. main camera properties here :

my scene has camera. run andorid phone , result below.it has small screen. when use cardboard, don't see clear view.

i install vr app play store(seaworld vr), runs properly.

you should disable/delete 'main camera' object , use 'cardboardmain' provided in 'cardboard/prefabs/' directory.