I agree. It's just that for most cases, it's not a matter of improving. It's a matter of being stubborn about your own idea. Look at twitter's app for example,

I agree. It's just that for most cases, it's not a matter of improving. It's a matter of being stubborn about your own idea. Look at twitter's app for example, they keep their design very close to the standard UIKit's HIG while improving some aspects(pull to refresh is a great example)