Thank you for getting back to me and for the welcome, Marguerite.
I'm torn, really, about Storyist. I used Scrivener for a long time and then gave up because the compile process was so crazy, and it ended up costing rather than saving me time. Storyist looks like it would handle all the bits and pieces that I have trouble keeping organized, but it's also a potential procrastination vehicle. And dog knows I need no more encouragement on that front.
Also, in response to the other thread I started: I understand that the two programs are very different, and I don't expect either of them to be free. But I would think that there should be some kind of package that makes it possible to get both of them for something less than $120. That's a lot of money for software that I'm not sure about, even after a fifteen day trial. And a big part of the attraction, for me at least, is the ability to move back and forth from iPad to MacBook Pro. Right now I'm using Libre Office (which I love; I'll never go back to Word) for everything, but it's got one big problem: there's no IOS version, unless you go through a very awkward third party. And of course it doesn't have any of the features that make Storyist appealing..
So I'll continue to explore and put off the purchase for the time being. Your help is very much appreciated. Thanks again.