The PaintPot app allows you to paint over a picture (Canvas) shows the picture of a cat by default.
the picture can be replaced by a camera shot by clicking a button to access the camera
tapping on the picture produces a dot of the selected color and size.
dragging your finger on the picture draws a line.
the Wipe button will clear the picture of any painting previously done.
the Big Dots (2px) and Small Dots (8px) buttons alternate the size of the dots.
Scan or click on the barcode to download the app!
The app’s user interface doesn't provide much information about the current settings (for example, the only way to know the current dot size or color is to draw something). Modify the app so that these settings are displayed to the user.
Let the user enter the dot size within a TextBox component.
Documentation
You can see a description and a walk-through of the app here
You can download the app source from here