ChemApp is described as 'Powerful tool that will help you to solve everything from the simplest to the most complex of chemistry problems - from balancing chemical reactions and finding molar masses to solving reaction stoichiometry problems' and is an app in the education & reference category. There are more than 10 alternatives to ChemApp for a variety of platforms, including Windows, Linux, Android, iPhone and Web-based apps. The best ChemApp alternative is Atomic - Periodic Table, which is both free and Open Source. Other great apps like ChemApp are ChemistryLab, Chemaxon Marvin, Molsketch and ChemDraw.