Almost Perfect
I was reluctant to purchase the full version but Im glad I did. So far, I have been using it primarily for designing circuit diagrams. First I created a bunch of symbols, then I copy, paste, rotate, resize and move them around as much as I want. With paper, I would have gone though many sheets or whole erasers revising my work, but not with Inkflow Plus! Im very happy and I hope the Qrayon team continues to develop it while keeping the interface simple. That said, I would love to see the following features.
Group objects using selection tool, then lock them together so you can select them with a single tap, without having to use the selection tool to draw around the object. Useful for creating reusable objects. You could take it further by saving objects to libraries to share the objects between all notebooks & make them available in a drop down from the top toolbar.
Place the eraser icon in the toolbar between the brush & selection tool.
Draw basic shapes - square, rectangle, circle, oval.
If you like the free version of Inkflow, I recommend the full version.
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Inkflow Plus Visual Notebook, v4.0