A web application Genshin Impact Wish Simulator created by Uzair Ashraf. Practically a perfect replica of the in-game wish system that works in right your web browser! In can track your inventory and spending, and even go back to past banners.
In this simulator I got Yoimiya on the 1st 10 wish pull, but in the game I have only Sayu C0.
I got Beidou Fischl Chongyun AND Zhongli IN A SINGLE WISH after 100 pulls on the Gentry of Hermitage banner!!
What even IS the probability of that?? XD