Option to randomize positions of pin numbers on mobile

Giving users an option to randomize the positions of the pin numbers on mobile would increase security. It would make shoulder surfing more difficult and it would prevent the building up of grease marks on the screen that reveal the pin. So for example, where “1” is normally to the top right, instead its position would be somewhere different, like middle right or something. This would make logging in more difficult and cumbersome, but to some users it might be worth it.