Nice! I've been writing for a long time as well. I've found writing consistently and in a stream of consciousness manner is very helpful. This being HN, you can bet that I also wrote an app for my practice ;) https://www.indelibleapp.com/
I just tried it out but got the error when I tried to save a draft: "Argument schedule for data.prompt.create.schedule must not be null. Please use undefined instead." — this is from starting off of the tutorial, and trying to hit save.