Ok, so I wrote a review on one small game that it has a bar on the bottom where my soft keys would be but I am in fullscreen and it should be from edge to edge. The guy contacted me with a message he doesn't get it since in the report the Google play store wrote him my phone is 16:9 ratio. I find many apps with bars on the bottom or on both sides, others work fine. I can provide more info about this problem. But I feel there is just small thing needed to be done in code to fix this problem and many apps might adapt to it. Thanks for any info on this.
