This is the application Ball Clock owners have been waiting for!

What is a Ball Clock and why do you need a simulator for it? If you don't know what a Ball Clock is, start with the YouTube video in the help file of the app, or go to YouTube and search for: "Ball Clock Time Machine". This program simulates the operation of a Ball Clock and calculates how many days it takes for the ball bearings to return to their original ordering. It's called the "Ball Clock" problem and it's been a topic of computer science since at least 1995. The help file in the program provides historical background and links to the git repository for this program so you can study the code and learn some of the basics of programming in Xcode.