I like this app, it helps me review in a way that feels like a game. There are a few wrong answers though. It the biochemistry section a question asks "If two identical atoms are equally sharing an electron, what is it called?" Should be covalent or non-polar, but the "correct" answer is polar. In the human physiology section it asks "Which of the following is not a type of muscle?" The choices are smooth, rough, blank and I. Cardiac and striated should be added instead of blank and I.