My broker has a much more fully featured web app then it does on iOS or Android. You can do things in a browser that the phone apps will send you to a browser to do. BofA is just as good of a web app. Maybe people are just used to using their phones?
Can you deposit checks from the webapp? That is the feature most often missing in banking webapps. It isn't something I need often, fortunately.
Looking down the thread I am also thinking maybe this is a Europe thing? I am usa.