Once the app recognizes the album cover image, the image transforms into an AR object and then dissolves as it's replaced by a singing, virtual Bono (the lead singer of the group).
Oddly, although the app has a built-in function to allow you to save photos of the AR experience, the app doesn't allow you to record video of the AR animations (you can use screen record on your iOS device for that).
The band is also promising an additional live AR component that will be available to fans who bring the app to live U2 tour shows. Once fans get to the venue, they'll find a 100-foot-long LED wall with images that will serve as the triggers for a massive AR experience via their smartphones.
See the full story here: https://next.reality.news/news/u2-kicks-off-latest-tour-with-augmented-reality-app-experience-0184356/