An iOS app that allows you to conveniently measure UI elements directly from your screenshots.
 Simply select a screenshot from your camera roll and tap or double tap to measure pixel and point dimensions, rectangles and angles. You can also tap and hold to get the hex colour for any pixel under your finger, or add guides for screen halves, thirds or the iOS defaults. UI Check is a useful little app for designers and developers to double-check prototypes and make sure the layout is pixel perfect.