Not OP but the Carbo app does this, you take a picture of a drawing and it converts to faux chalkboard or blueprints
Most iPad note taking apps I've tried have that as a background option and then you just draw in white using the pencil
can i write in the faux chalkboard/blueprint style or is that only an export functionality? hoping to edit that way
You can adjust the sensitivity of the writing scanner so it looks more organic if you want, and you can draw directly in the app although that doesn’t allow for sensitivity or pressure based influence on thickness of the lines of the things you draw