Photogene gives iPhone and iPod Touch users the capability to edit photos directly on their devices.
Before levels editing
Photogene's tools are along the left side of the phone when editing. Advanced tool options are displayed at the bottom when a tool is selected. This screenshot was taken before any editing was done to the photo.
This screenshot was taken after the photo levels were edited manually. The histogram and automatic-levels button is at the bottom of the screen. Photogene's developer intends to add individual histograms for red, green, and blue in version 2.0.