@John159 The app has improved a little lately, but it can still mess with things in surprising ways. For example, if you set the "Don't want bookings X days in advance", it has (for months) actually set the value as X-1, and it changes it to that in the regular site, too. And if you correct it on the site, the next time you look at the app, it will display the X-1 value. And, I think, the mere act of *looking* at that setting in the app may reset the web site again. Something like that. As far as I know, this behavior, or some variation of it, was still happening just two days ago.
The app used to have other issues. Some have been fixed, but I don't really trust it. I primarily use it only to respond to messages and to glance at my calendar. I only use it to accept/decline bookings if I have no other choice.