Roll 10 sided die. Or roll anything bigger than 10 and throw away rolls larger than 10.

On GrapheneOS. I don't know if other versions of android have it. Makes the numbers on your login pin in a different layout each time.

https://files.sovbit.host/media/010df0c948fe9ab54d2cb7ea420ffa08d57958981b6ea68e83aaa7eb2dd3f05a/8be7ff572ed59f678d4c4dc61ebd82b49a2a45712acf32d342ae6c1d990263aa.webp