The example photograph here shows 4 strips from 4 separate photos. The top two strips were 4:3 settings, one from the inbuilt camera and one from Open Camera. The next two (right aligned) are 16:9 versions, again, from top to bottom, from the inbuilt app and Open Camera.
The field of view is wider slightly in the Open Camera app (note how the bench is further in on the right and the bushes on the far left can be seen more) and the field of view in 16:9 mode is also wider than in 4:3, but with a substantially smaller pixel count.
Information and clarity seems to be being lost needlessly.