Yes there is - it makes your app integrate better with the platform. Sure, the initial choices may have been completely arbitrary, but as an app developer you h

Yes there is - it makes your app integrate better with the platform. Sure, the initial choices may have been completely arbitrary, but as an app developer you have to live by them now. Consistency is the reason. Users learn the platform and learn its standard UI paradigms. Should you choose not to follow them, your users will not be very pleased to say the least, often confused as to why your app doesn't operate like everything else on their device.