Useless

Go borrow a Chemistry book from the library. This is a waste of time and money. The so called chemistry formulas are a photocopy of some book and not even well done. You know the copy of a copy type of look and hard to see. A brazen time waster. Apple really should protect customers by not letting every so called developer post an App that just serves to dupe the innocent buyer. There, I have got my dollars worth.

Typical Nerd about Chemistry Formulas