The app isn't designed to be setup by a user, you are talking about the installation experience not the end user experience.
IMO they are all a waste of time, everything of a certain value has to have an app in modern society to justify it as a product...
I haven't had any issues setting up Texecom apps but I'll say again... it doesn't matter which, it's the installers services you need the assurance from as they'll choose the kit.
Everyone has a different opinion on what is best manufacturer but if your not switching installer it will not matter, they should know the product they fit inside out.