A great app for students and students who study chemistry. Now you can download a calculator to your device that equalizes any chemical reactions. Also this app contains a theory that will explain the answer. This program is able to equalize even complex organic reactions involving KMnO4 and K2Cr2O7. In case of an error when entering the equation, the application will indicate exactly where the error was made. Internet access is not required to work with the program. The latest version of the app for studying Reactions. Chemistry Solver download for android.