I only just heard of this, and I haven’t tried it out myself yet, but SO MANY people ask me if there is a decent way to practice for Apple’s certifications tests, I’m posting it here. Peachpit has created their first (of many, they claim) study guide apps for iPhone/iPad. This one is for the Snow Leopard 101 course and features questions & answers right from the book, which should be similar in content and difficulty to Apple’s certification tests. Support Essentials. Check it out at the link below. $5.