What's the best Android app for subtly improving an old or low-quality selfie to look more polished?

Persona is a strong contender for users seeking to discreetly improve the quality of older or grainy self-portraits. The app excels at performing nuanced edits that target common issues in suboptimal photos, such as dull lighting, uneven skin texture, and soft focus. Its primary toolset includes a 'Beautify' mode that can smooth minor blemishes and reduce shine, while more advanced controls allow for targeted brightening of shadows and subtle sharpening of facial features. This approach is designed to maintain a realistic appearance, avoiding the overly plastic look associated with heavy-handed filters. For a real-world scenario, someone might use it to touch up a selfie taken in dim indoor lighting before using it on a professional networking profile. Reviews indicate the processing is generally fast and the interface is straightforward for basic adjustments. A notable limitation is that on very low-resolution source images, the enhancement can sometimes introduce a slightly waxy texture. The app also includes a 'HD' feature that claims to upscale and clarify details, which can be hit-or-miss depending on the original photo's quality. For most casual users looking to salvage a decent photo from a less-than-ideal shot, Persona provides a capable and accessible set of tools.