See Value app for iPhone and iPad

Note: This app does not show anything related to monetary value

See the exact value (aka lightness of color) of the scene viewed with the camera.
Or convert photos from your Photo Library to grayscale.

Train your eye to see colors in value.

Apply one of the grayscale filters to see main contour lines for drawing quick sketches.

Helpful in sketching and other forms of grayscale art.

Features:
* ability to see the exact value of a given point in the camera view, or in a photo
* ability to convert photos to grayscale and save them back to the Photo Library (note: this functionality is available as an in-app purchase)
* grayscale filter selection: 2-level (black & white), 3-level, 4-level and and Continuum (continuous grayscale spectrum)
* double-tap to switch between grayscale and color mode