1. hard to rate after only doing a quiz twice.requires in app purchase, but great for practice test questionsWish it wasn't so expensive to unlock premium.This App user friendly and very helpful.I like the explanations after each question.
2. great too for learning it shows you what is essential got taking the cst exam and what you should know witch is everythingonly 10 questions.
3. Keeps me looking up the things I did not know.I paid for the app, and got to use it maybe one month.This practice does help.