Capturing drawings is easy with AppSheet. The Drawing type provides a canvas and colored pens that allow you to capture free-form sketches within the app.
To capture drawings, insert a column in your spreadsheet and include the word "Drawing" in the column header. AppSheet will automatically detect this new column as a Drawing Type after you regenerate column structure.
Alternatively, you can name the column anything you like and change the Column Type to Drawing manually in the Editor>Data>Column Structure tab.