Be Excellent To Each Other

As part of my job at work, i have to start project requirements gathering. Currently I use one-note to help create lists etc (it syncs between my ipad and my laptop)

I want to start drawing these visually. At the moment, I use use my drawn them on paper then, either draw them in visio or archimate after.

Just wondered if there is ipad app I can use to do this save drawing on paper first.

You can draw in One Note can't you?

Ish, I want to be able to do spider/star diagrams. Central hub, then pull out nodes and drill down in them. adding more and more details

I tend to do diagrams in draw.io which can save directly to OneDrive. I see there's an Android app for it too, but not sure about iPad, although apparently their web app works ok on mobile anyway.