Hey. I'm doing App Academy this summer, so I can't tell you about the program, but I can give you my thoughts on the interview. Based on what you said in the comments above, it sounds like we have somewhat similar backgrounds.

The interview was mostly pretty simple code problems. If you felt like you knew what you were doing in your cs classes and that you were keeping up with the other students, you'll probably be able to handle these. Just make sure you're comfortable with the ruby needed to do the practice problems.

Good luck!