When releasing an iOS app for iPhone, does it also have to work on iPad?
_Make sure your app works on iPad, not just on iPhone. Users appreciate having the flexibility to run your app on either type of iOS device. Even if you expect most people to use your app on iPhone, interface elements should remain visible and functional on iPad. If certain features of your app require iPhone-specific hardware—like 3D Touch—consider hiding or disabling those features on iPad and letting people use your app's other features._
This is taken from the HIG and seems to suggest that apps have to work for both. If I specifically create this as an iPhone only app, does it still have to work on iPad?