Will iOS app accepted on App Store if 80% of UI is rendered on UIWebView and 20% being native OCR
This is walking into a grey area I don't know about. According to the Apple App guidelines, an app cannot just be a mobile version of a website. Since it seems as if you are just adding device capabilities, it will probably be rejected. Think of the Stack Overflow app. If it was just converting a website to an app without a address bar, it would not exist. They had to app-ify most(if not all) of the UI elements. You might be able to get away with leaving some things like a login form in the website form, but it has to look seamless.