New Play Store app icon rules include rounded square mandate, no more transparent backgrounds. By Jordan Palmer. ... Google will no longer accept icons that do not meet the new standards, ...

Icon assets will remain the same size (512 x 512), but transparent backgrounds will no longer be allowed. Google Play on Android and Chrome OS will dynamically apply rounded corners and drop ...

It prohibits transparent backgrounds, with Google dynamically adding rounded corners and drop shadows to icons. This applies to the Play Store on Android phones and tablets, as well as Chromebooks.