devSJR, When I take photos under Android, I use the #OpenCamera with great pleasure. There are many tricks for creating good photos.
A gap under Android was previously post-processing. #ImageToolBox fills the void. In addition to #OCR, picture comparison, PDF creation, #watermark, color gradient, stitching (in a grid), encryption, GIF, cropping and scaling, the app has more than 150 filters, which can also be edited with masks (i.e., only to certain image areas).