Apple already confirmed that iOS6 devices, including the iPhone 5, won't come pre-loaded with YouTube and Google has reacted swiftly.
Andrey Doronichev announced the new iPhone app in a YouTube blog post and has pointed to features that "give our iPhone and iPod touch users the best mobile experience."
Among said features are a new channel guide that lets you check your subscribed channels by swiping your finger from the left edge of the screen. Google has also made it quicker and easier to search for videos and share them over Google+ and Facebook.
Fear not, iPad users - Andrey says that's coming along too: "We’re working on an optimized version of the YouTube app for iPad in the coming months, stay tuned for more details," he wrote.
This is another step away from Google for Apple - the Cupertino company revealed back at WWDC that it plans to use TomTom maps instead of Google's own for its iOS6 devices.
Of course, we expect more to be revealed tomorrow when the iPhone 5 gets a full introduction.