Molecules vs MoleculeSketch iP

Molecules is an application for viewing three-dimensional renderings of molecules and manipulating them using your fingers. You can rotate the molecules by moving your finger across the display, zoom in or out by using two-finger pinch gestures, or pan the molecule by moving two fingers across the screen at once. These structures can be viewed in both ball-and-stick and spacefilling visualization modes. Molecules can be stored on your handheld device for later viewing and are loaded via a standard document-based file browser. Custom molecular structures can be downloaded to the application via file sharing or iCloud, and obtained via sources like the RCSB Protein Data Bank (http://www.rcsb.org/pdb), an international repository of biological molecules and their 3-D structures, or NCBI's PubChem (http://pubchem.ncbi.nlm.nih.gov), a public database of compounds. For more details, please visit our website. Molecules is a BSD-licensed open source project.

MoleculeSketch is a simple and easy to use drawing App for chemical formulas and reactions. MoleculeSketch iOS is the standalone version of MoleculeSketch for iPad. The free version offers basic functionality. The full version can be unlocked with an in-app purchase. It has following features: + add atoms and bonds nicely by position locking (can be disabled) + choose different bond types (double, stereochemical, delocalised, etc.) + 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 + add reaction arrows and text fields + access drawing attributes from popover panels + calculate average mass and formula of molecules (*) + group and arrange objects (*) + change background color of drawing area and add a grid + copy/paste/cut molecules and drawings + paste drawings into other applications + import from mol/sdf files (*) + use gestures for zooming and rotation + import structures from mol- or sdf-files (*) (*) some of these features and others are only available when using the full version (inApp purchase)