A small photo editing tool to to skew, scale, distort, rotate and change the perspective of individual parts or whole images.
Grid points can be set manually to fit the needs of your project.

Features:
● Skew (shear), scale, rotate, perspective warp
● Manually adjustable grid
● Load pictures from within the app or directly from the gallery
● Reads EXIF image rotation
● Saving full (PNG) & cropped (JPG) up to 16MP (4096x4096)
● Auto cropping largest inscribed rectangle
● Resuming last state on startup
● Pinch-to-zoom
● Simple and clean UI
● Phone & tablet support
● Portrait & landscape support

Tips & Tricks:
● Double-tap to reset picture zoom
● Long-press undo button to reset warp / grid

Forum:
https://forum.xda-developers.com/android/apps-games/app-image-warp-grid-modifier-0-0-2-t3816878