I don't remember what instructions I used, but this looks like it should work. It's a bunch of steps, but I don't remember having any real problems.
You're not stuck with the Amazon App Store.
www.howtogeek.com
As per the app, it seems to do very well in selecting the drills/shots it presents; not too easy, not too hard. There was one I just could not do, seemed impossible to hold the cue ball to the specified spot, even w/object ball barely getting to the pocket. But then I tried from the other end of my (kinda funky) table and could do it.
Which is a question I have - is there any way to save a link or ID of a particular shot? I ended up just taking a screenshot of that one: