The new Google Edition Galaxy S4 and HTC One
handsets include a slightly different setup than stock Android phones before, and the camera app is the one with an updated interface as well.
The app presents the shooting modes on a curved line when you press and hold the screen, and this allows quick access to HDR, exposure adjustments and so on, while the volume rocker can now be used as a shutter key. When you press the More Options feature, the choices are presented in the same semi-circle, including the ability to opt in and out of geolocation data.
If you are interested to take the new stock Android camera app for a taste of what's to come, get the APK from the source link below, and remember to disable your default camera app first, as not all features will work on all devices as they do on the S4
or HTC One