ImageBrighter app for iPhone and iPad

ImageBrighter lightens, and darkens the photograph by a very easy operation.
The operation is as follows.

Step1. The window above is chosen and the photograph processed from the camera roll is chosen touching.
Step2. Strength of the effect is adjusted by operating the slide bar below. The adjusted image is displayed in the nether window.
Step3. The confirmation dialog is displayed when ..window below.. touching, and the processed photograph is added to the camera roll when .."O.K.".. touching.