What's the best free Android app for professional photo editing, including RAW image support, selective adjustments, and advanced tools like healing and perspective correction?

Snapseed is an excellent, free photo editing application for Android, providing a comprehensive suite of tools suitable for professional-level image manipulation. It stands out with its ability to handle RAW images, allowing for non-destructive editing and greater control over the final result. The selective adjustment feature enables users to precisely edit specific areas of a photo, enhancing details or correcting imperfections with ease. Furthermore, Snapseed includes advanced tools such as healing, which removes blemishes and distractions seamlessly, and perspective correction, which fixes skewed lines and distorted angles. To use selective adjustments, simply open your image, select the 'Selective' tool, tap on the area you want to adjust, and then swipe to modify brightness, contrast, or saturation. With its user-friendly interface and powerful capabilities, Snapseed is a must-have for anyone serious about mobile photo editing.