This app was removed from the App Store.
Mac OS Photography
Tintii is a photo filter for saturation control, especially selective color effects.
Use Tintii to quickly create selective color photos. Start with a full color photo, then switch colors on (full color) or off (black and white) to pop the subject.
Or... keep it subtle. Tintii can emphasize and exaggerate colors that form the key ingredients of a composition, to draw attention where it's needed.