In another thread I saw a moderator say this: "Unfortunately on the mobile version of the app you can't use kers on both drivers simultaneously due to lack of screen space available".
Therefore, I suggest dividing the size of the massive kers button by two, and then replacing the missing half with a "double-kers" button next to it. therefore making the area of the screen where kers can be used a lot more versatile and useful to the player on mobile.
