Molecules
This is a good app but it needs editing. When there are several molecules on a page sometimes they are not labelled and nit next to the appropriate text, and there are frequent right-left errors. (Sometimes when describing location of methyl groups.)
Trying to spin images near the margins is too likely to change pages instead.
Some text does not work in the iPad version ("table on this page" is actually on the next.) Display of page numbers would be helpful. Finally, I am surprised here is nothing more specific about stereoisomers, e.g., ephedrine and pseudoephedrine.
Dowl1649 about
Molecules by Theodore Gray, v1.1.0