Originally Posted by Supercell:
“Yes, it's a google app so apple have got rid!. You just have to download the one for the iPhone as there isn't one for the iPad...but they say they are working on it!”
'Got rid' isn't accurate. Apple had a 5 year agreement with YouTube to provide the app as part of iOS. Those 5 years have now passed and Google have decided not to offer it for renewal, preferring to create their own app instead.
It's primarily about adverts. Apple never allowed adverts, which YouTube's business model has grown so dependant on so having such a large number of users out of their primary revenue stream was far from an ideal situation for Google.