Use exactly 36 combinations instead of two dice
There is an app called Catan Smart Dice which does exacly what I need.

With the possibility to have the dice be a fair dice: there are 36 possible rolls (1-1, 1-2, 1-3...) And such a fair dice rolls all the possible permutations once before repeating a permutation again



Also an app, where you can also adjust the number of dice and adjust the "fairness": Fair Dice