The new iPhone 13 Pro models that launched today are equipped with ProMotion display technology, which allows for adaptive refresh rates ranging from 10Hz all the way to 120Hz, which is ideal for scrolling through content, gaming, and more, because it makes for a smoother viewing experience.

Though there's a 120Hz maximum refresh rate, App Store developers have found that most app animations are limited to 60Hz, which results in an uneven viewing experience for users.

As noted by 9to5Mac, ProMotion works at the full 120Hz for scrolling and full-screen transitions, but animations are limited to 60Hz.

So when you're scrolling through your Twitter timeline, for example, you'll see the smooth ProMotion experience, but animations at 60Hz mean other interactions are noticeably less smooth.

— Christian Selig (@ChristianSelig) September 24, 2021.

— Christian Selig (@ChristianSelig) September 24, 2021?