When I bought an iPad pro, I asked friends what are their favorite apps. One person religiously vouched for how much Muse has affected the way they work on a day to day. Like me, they are a artist and in the software space, and felt Muse gave them the ability to both organize things spatially, while making use of the iPad's drawing features in everything they do.

I was able to get on the beta and found it quite satisfying as an application. Its basically the missing OS for iPad to let you do everything that you imagine the iPad is supposed to let you do.