We thank and acknowledge these great artists for providing images used on the App Store:

• vis-a-v., http://www.flickr.com/photos/84853566@N00/3409620720/
• magnetismus, http://www.flickr.com/photos/64550890@N06/6175142092/
• Nina Matthews Photography, http://www.flickr.com/photos/21560098@N06/7050103081/
• vl8189, http://www.flickr.com/photos/27630470@N03/4742973358/