“3D Molecules Edit & Test” allows one to build and manipulate 3D molecular models of organic and inorganic compounds. The key features of “3D Molecules Edit & Test” are 3D printing support and the "Test yourself" mode that allows learners to check their knowledge of the 3D structure of molecules. This is a valuable tool for chemistry students when learning about molecular bonding and orbitals with the aid of 3D visualisation. The app is great for any high school or college student in chemistry courses.