I agree with Dancer, completely. We had to learn the prof's specific attachments for our exams (verbatim!), so it would have been futile for me to try to learn one from an app prior to class starting.
If you want to get ahead (I recommend enjoying your freedom while you have it now, rather that study!)... My recommendation is finding out what atlas the program uses and getting the book in advance. You can start reviewing: IDing muscles, arteries and nerves; in addition to, muscle innervations & actions. Reviewing pictures in atlases would be very helpful prior to your first class and lab.
I'm a huge fan of making lists: consider making lists of what actions muscles do, what structures run under important land marks (poplitial fossa, carpal tunnel, etc) and memorizing the brachial plexus (forwards and backwards). That would be helpful, as well. You can begin making your own flash cards for lists (Crackberry is another app that you can use via computer and phone: plus you can share lists with your classmates!). Really, don't worry about specific attachments until you know what your prof wants!
If your program uses Netter, I do recommend the flash cards (paper or phone app) if you are a visual person and don't want to haul the atlas around: the book is quite heavy. Though I found that it was imperative that I made my own flash cards in addition to that.
Just my $0.02. Good luck!! 😀
