This is pretty cool. But you do need to trust their website and app, and your scanning device.

Also, the website says you get about 192 bits of entropy. It's been a while since I did any combinatorics. It seems you should have 25! * ((6 * 4) ^ 25) possible dice rolls. 25! combinations of dice placement times (6 face up possibilities * 4 rotational possibilities) for 25 dice.

Python gives:

import math math.factorial(25) * (6 * 4)^25

496508538648719564809316402287439226010265627463254016000000

2^196

100433627766186892221372630771322662657637687111424552206336