So perhaps I won't have to write my own app for keeping an electronics projects logbook after all. There is a scarcity of reasonably simple apps that let you mix notes with images, without lots of clickery. I will be taking a very close look at this app!
Similarly to append text to a note (think of a log), you first have to click somewhere, choose a cell type…
Overall, it seems to be a nice app, but for people who enjoy spending time organizing their notes. I don't, I just want a simple way to keep my notes — so I guess it's back to writing my own app after all.