Google Camera is the official camera app developed by Google for Android devices, which is a substitute for the camera app that comes by default.
The first thing that will strike you about Google Camera is something negative. The problem is that the button that you use to take the photo takes up almost a fifth of the screen, covering a large part of the space that you could be seeing. Now, except for this problem, the rest of the interface is very accessible.
You can take spherical photos in order to take advantage of the views that surround you in 360 degrees. In addition, you can apply an out-of-focus effect for SLR photos with a superficial (fake) depth of field or you can activate the high-resolution panoramic image mode. All of this is available from an extendable side panel.
Google Camera is a good camera app that doesn't need to have a ton of filters and other fancy features. It is a very solid alternative that allows you to do exactly what it should: take good photos whenever you want to.