Based on the community replies, two apps were directly recommended:

• Camera360: Suggested for its wide range of effects and creative modes, including LOMO, retro, black-and-white, night enhancement, HDR-style effects, tilt-shift, color-shift, symmetry effects, and scene/composite templates. A clear advantage is the variety of built-in looks and social sharing options. A possible downside is that it appears more focused on effects and fun filters than on traditional, precise photo correction.

• Photoshop Mobile: Recommended as a strong overall editor by one user. Its likely advantage is a more familiar editing workflow and broader editing credibility. The reply, however, did not give specific pros or cons.

A third app, Streamzoo, was mentioned by its founder, so that recommendation should be treated cautiously as promotional.

If you want creative filters and one-tap looks, Camera360 seems to be the strongest recommendation from these answers. If you prefer a more conventional editing app, Photoshop Mobile is the other option mentioned.