The app "3D-Chemie" was developed in cooperation between the ICBT and the IAS (www.zhaw.ch/lsfm) and funded by the ZHAW through funding for e-learning. The app is intended to train and promote the students' three-dimensional imagination for molecular structures, since the three-dimensional structure of molecular compounds often explains or determines behavior or function. The students should also be able to visualize chemical and biological structures independent of specific (and expensive) sof