I have it. And it works. But the dev says it has a scheduling feature and still has yet to describe how to make that work. The screen shots were recently updated but the options section still does not reflect what my screen shows. It's an entirely different thing.
I bought the app based on the assumption that it can schedule backups. So far all I see is an option to schedule Calendar to REMIND you to back up. It does not actually do any backups automatically unless you open the app with it set to backup when opened.
I think there is probably some confusion because the dev probably does not speak English natively. I'm told that older versions actually had the ability to automatically backup on a schedule. Again, that seems to be missing in the newer versions.