Very little for the money
I have to agree with the other reviewer who said it's not worth the money. The app presents the the electron configurations and other basic information on a selection of elements. It also presents the various orbitals scaled according to the atomic number but there's no attempt to illustrate which orbitals are occupied for example. There are a couple of short multiple choice quizzes. In short the app costs $4 for a pretty much one time use of a part of a section on orbitals. It really could be more instructive and for the money really should be. This app is just not up to par with other software from Wavefunction, inc.