There are random number generators which can generate numbers between a certain range without repeating a number. For nine ball generate number from 2 to 7 or for 10 ball 2 to 8. First 2 numbers get racked behind the 1. 3rd and 4th numbers get racked on either side of the nine. 5th and 6th get racked behind the 9. 7th and final number gets racked at the bottom of the stack. Every rack you click the button in the iPhone and get a new set of numbers.
All you would need is an iPhone with the correct app.
All you would need is an iPhone with the correct app.