Does anyone knows of any apps that has a extremely large canvas?
Something that can be used to draw mindmaps or flow charts in.
I'm not sure if this is considered a sketching or note taking app.
Zoom notes has an unlimited canvas. It's a lot like Prezi, if you're at all familiar with that.
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The inking effect in the pen style (ON by default) may take a bit off the responsiveness, but it makes the writing look so much more natural, organic and dynamic. IMHO this is a feature quite unique to Notes Plus. Check my attachment in reply 354 above, hope it helps.
Best of luck, and let us know your findings.
It does look beautiful. Not sure if the money is worth sacrificing any responsiveness. I think I'll stick with Notability and Zoom Notes.