Personally, I wouldn't worry too much about soaking in every thing the app has. Go through the app syllabus, do a couple of practice tests, but keep in my mind a lot of the stuff on the app you will not see on the test. You'll see some things that are similar, but don't stress too much about getting every little thing down. Focus more on the basics of everything and getting a good understanding of those things (parts of a boat/plane, what controls what on a plane, how lift is created, etc). Once you are done with the app syllabus, go to Kyle and Gomez's drives and read every thing in them. Again, you don't need to know everything in them by heart, but reading through them will help with the overall understanding of the topic. That's my two cents.