Several days apart, Apple released the final version of iOS 15.3 and the first developer beta of iOS 15.4 yesterday. This new update contains new features. Among them is the possibility to unlock iPhone 12 and 13 with Face ID. even if we wear masks. Another new feature is Developer release of iPhone 13 Pro ProMotion feature. This feature allows you to work with a refresh rate of up to 120Hz, which until now was only available in the system interface and Apple apps.

Apple Launches ProMotion and 15.4Hz Refresh Rate to Developers in iOS 120

The launch of the iPhone 13 Pro brought the long-awaited 120Hz refresh rate to the screens of these devices with the so-called ProMotion feature. iOS 15 made it possible to integrate this feature by connecting the iPhone 13 Pro’s hardware with iOS. Nevertheless, ProMotion has so far not been accessible to developers.


The new Super Retina XDR display with ProMotion can refresh at varying rates from 10 to 120 times per second, depending on what you’re doing. Automatically knows when to deliver maximum graphics performance and when to save power. It also adjusts the speed to match the speed of your fingers as you move. It’s like touching the future.

iPhone 13 Pro Max


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iOS 15.4 already recognizes faces even when wearing a mask.

According to an official Apple source, this A bug in Core Animation. Core Animation is one of the following: skeleton Or a work environment that provides high-speed and fluid animations without overloading the device’s CPU. That said, the novelty and high refresh rate of ProMotion fell into this framework. The existence of this bug prevented developers from integrating this functionality into their applications.

However Bug fixed in iOS 15.4. Y Developers are seeing applications starting to work at 120Hz. I have my doubts regarding the rest of the operating system because in many places on iOS the refresh rate is limited to 80Hz. Over the next few days, iPhone 13 Pro or Pro Max and iOS 15.4 beta users will experience: Significant change in the fluidity of the interface.