What most apps need can be done by listening to touch events instead of scroll events. Eg hiding the top bar when user started scrolling down and so on. I can'

What most apps need can be done by listening to touch events instead of scroll events. Eg hiding the top bar when user started scrolling down and so on. I can't even think of an app that has a parallax effect. If your app is required to have complex animations then web tech is not the right tech choice in general imo