Unusable by design
There is no learning curve. There’s a brick wall. Apple has spent years developing Human Interface Guidelines, and this developer has decided to ignore every single one of them. Nothing works the way millions of iOS applications have taught us things should be expected to work. Things scroll horizontally with no visual cue that scrolling is possible. How big is my page? Who knows? Can I change it? Whoo knows? Good luck reading that black text on a deep purple background. Font sizes are no help in determining what control is primary and what’s secondary. The “help” screens are laughable because no user who doesn’t share a consciousness with the developer understands the underlying assumptions the user interface makes about how the screen you’re looking at should be interpreted. I gave $9 (U.S.) to a developer who doesn’t know how to write an app that has the potential to be very good. I don’t think there was any intent to write something unusable. I’m sure the developer can make the thing sing. Since I don’t think like the developer, it’s not worth taking up space on my iPad or consciousness. Trying to get my money back would make me expend even more time I’ll never get back.