The calculator does not simulate the game perfectly. It has the following defects:
If you don't play Egg, Inc., then this page wouldn't be of much use to you. Also, do yourself a favor, and get hooked on this game. It's free, adorable, and takes very little time.
This page is a calculator that will compute how long it will take to get the 10B Enlightenment Trophy. Since once the farm is started, I won't be able to prestige or acquire new artifacts, I'd like to know whether the upgrades I currently have will complete the trophy in a reasonable amount of time.
The code for this calculator is public on Github. Contributions are always welcome, and comments too, at firstname.lastname@example.org.