I recently had to make some sketches of schematics. On iPad I tried excalidraw, ms whiteboard, notes, notability, and sketchbook: drawing the same thing on each. To my surprise, notes actually worked the best for me with the snapping editing and exporting. Notability was also very good, but I tried that only after finishing in notes.
Excalidraw works with Apple Pencil which is great but doesn’t have snapping and straightening of lines.
Excalidraw works with Apple Pencil which is great but doesn’t have snapping and straightening of lines.