MoleculeSketch is a simple and easy to use drawing App for chemical formulas and reactions.
It has following features:
+ add atoms and bonds nicely by position locking (can be disabled)
+ choose different double bond styles
+ add stereo bonds
+ add bonds with higher hapticity
+ type functional groups by double-clicking on symbol
+ show missing hydrogen atoms depending on free valences
+ "grow" and remove hydrogen atoms
+ show non bonding electron pairs on heteroatoms
+ change background color of drawing area and add a grid
+ copy/paste/cut molecules and drawings
+ paste drawings into other applications as pdf drawing
+ import from mol files (V2000 format)
+ use trackpad gestures for zooming and rotation
+ access drawing attributes from popover panels
+ add reaction arrows and text fields
+ calculate average mass and formula of molecules
+ group and arrange objects
Problems, that made it difficult to format text in text fields (color, traits, etc.), were solved.
Up to six family members will be able to use this app with Family Sharing enabled.