After launching iPhone 13 Pro and Pro Max with 120Hz ProMotion screens, it turned out that most animations in third-party apps still run at 60 FPS and cannot take full advantage of the displays of new devices. At the time, Apple said the culprit was a core animation bug that would be fixed in subsequent builds of iOS. It looks like the company fixed the issue in iOS 15.4.
In the iOS 15.4 beta released yesterday, Apple made a change that allows third-party apps to automatically render animations at 120Hz refresh rates on the iPhone 13 Pro and Pro Max. Apollo photo app developer Christian Selig announced on Twitter today that he had received news from Apple that iOS 15.4 will support in-app animations at 120fps, and he himself was able to confirm the change.
Yay, got a little message from someone at Apple today that this is fixed in the iOS 15.4 betas and all apps will automatically get 120Hz animations on supported iPhones going forward, and just confirmed myself. (See attachment, 1/120 = 8.33ms) 🥳🥳🥳 https://t.co/EtZ9zkrM6S pic.twitter.com/04cl8uLb11
— Christian Selig (@ChristianSelig) January 27, 2022
With support for a 120Hz refresh rate, the new flagship iPhones can deliver smoother images than previous generations. This is particularly noticeable when scrolling through content and in games. It is worth noting that many Android smartphone manufacturers have been offering high refresh rate screens for some time, even in fairly affordable devices. Apple itself presented its first device with ProMotion in the summer of 2017. They became the second generation iPad Pro.