Google has released camera app in the Play Store for all the Android devices running on Android 4.4 and later.
Photo Spheres for immersive 360º views
Lens Blur mode for SLR-like photos with shallow depth of field
Panorama mode with high resolution
100% viewfinder for getting the maximum resolution from the sensor(no dropped pixels)
Updated UI that gets out of your way and is centered on an extra large capture button
Download Google Camera