iMolDraw is a great start for a chemistry drawing app. – iMolecular Draw Review

Far better than the only other chemistry drawing app I'm aware of. It's terrific for quickly sketching out ideas or archiving structures for reference. The previous reviewer pointed out a big flaw: the program ignores hydrogen atoms when calculating MW. I wrote to the developer with some questions but have not received an answer. Maybe other users have figured these out. 1) Is there a way to move just a part of the molecule? For example, I can use the lasso tool to select a phenyl ring. I would like to move it out of the way of another group. Every time I try, I move the entire structure. 2) What is the function of the button with the little gear and the label CTL. It doesn't seem to do anything except change color. I also offered two suggestions that would improve the usability of iMolDraw. The program uses the MOL file format which is great for exchanging data with other chemistry programs. ChemDraw is, by far, the most popular chemistry drawing program for PCs and Macs. It can read and save MOL files but the default is its own CDX format. I wish iMolDraw could read CDX files directly. The developer also offers the free iMolServer for exchanging files between a PC and iPhone. I wish for a Mac version or the ability to import files directly from the iDisk. This program is a great start. I've been wanting a program like this ever since I had my Apple Newton. A few improvements and it will deserve 5 stars.
Review by PhD Chemist on iMolecular Draw.