The apps we tested provide edits that are more in-depth than the basic adjustments that come with those OS-level and social media camera apps. Exposure and curves tools, for instance, can more precisely correct for over- or underexposure than a simple brightness adjustment. Clarity and dehaze tools can help add definition to high-contrast edges, giving images a punchier look. Spot healing gets rid of unwanted bits of dust, smudges, or even passersby.