[ Official ] How was the Prelims 2021 paper?

Can anyone tell me where to find ForumIAS score calculator.

PS- I don’t think cut off is going to cross 88, that’s the maximum in my opinion. Have given attempts since 2015, cleared all Pre and gave 2 interviews. This was the toughest prelims in my opinion. Highest I have scored was 151 and lowest was 116 till now. Sharing to back up my analysis. All the best guys.