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When Apple introduced the iPhone 4, everyone was fascinated by the fine pixel density of its display. Then nothing much happened for a long time until he came with the iPhone X and its OLED. At that time it was mandatory, because it was common among competitors. Now we are introduced to the iPhone 13 Pro and its ProMotion display with an adaptive refresh rate that reaches up to 120 Hz. But Android phones can do more. But also usually worse. 

Here we have another factor in which individual smartphone manufacturers can compete. The refresh rate also depends on the size of the display, its resolution, the shape of the cut-out or cut-out. This determines how often the displayed content is updated on the display. Before the iPhone 13 Pro, Apple phones have a fixed 60Hz refresh rate, so content updates 60x per second. The most advanced duo of iPhones in the form of the 13 Pro and 13 Pro Max models can adaptively change this frequency depending on how you interact with the device. That is from 10 to 120 Hz, i.e. from 10x to 120x display refresh per second.

Normal competition 

Nowadays, even mid-range Android phones have 120Hz displays. But usually their refresh rate is not adaptive, but fixed, and you have to determine it yourself. Do you want maximum enjoyment? Turn on 120 Hz. Do you rather need to save battery? You switch to 60 Hz. And there is also a golden mean in the form of 90 Hz. This is definitely not very convenient for the user.

That's why Apple chose the best way it could - with regard to the experience and with regard to the durability of the device. If we don't count the time spent playing graphically demanding games, most of the time the 120Hz frequency is simply not needed. You will especially appreciate the higher screen refresh when moving in the system and applications, as well as playing animations. If a static image is displayed, there is no need for the display to flash 120x per second, when 10x is enough. If nothing else, it mainly saves the battery.

The iPhone 13 Pro is not the first 

Apple introduced its ProMotion technology, as it refers to adaptive refresh rate, in the iPad Pro already in 2017. Although it was not an OLED display, but only its Liquid Retina display with LED backlighting and IPS technology. He showed his competition what it can look like and made a bit of a mess with it. After all, it only took a while before iPhones brought this technology. 

Of course, Android phones try to improve the variety of content display with the help of a higher frequency of the display in order to extend the battery life. So Apple is certainly not the only one that has an adaptive refresh rate. The Samsung Galaxy S21 Ultra 5G can do it in the same way, the lower model Samsung Galaxy S21 and 21+ can do it in the range of 48 Hz to 120 Hz. Unlike Apple, however, it again gives users a choice. They can also switch on a fixed 60Hz refresh rate if they want.

If we look at the Xiaomi Mi 11 Ultra model, which you can currently get for less than CZK 10, then by default you only have 60 Hz enabled and you have to enable the adaptive frequency yourself. However, Xiaomi usually uses the 7-step AdaptiveSync refresh rate, which includes frequencies of 30, 48, 50, 60, 90, 120 and 144 Hz. It therefore has a higher range than in the iPhone 13 Pro, on the other hand, it cannot reach the economical 10 Hz. The user can't judge it with his eyes, but he can tell by the battery life.

And that's what it's all about - balancing the user experience of using the phone. With a higher refresh rate, everything looks better and everything that happens on it looks smoother and more pleasant. However, the price for this is higher battery drain. Here, the adaptive refresh rate clearly has the upper hand over the fixed one. Moreover, with technological progress, it should soon become an absolute standard. 

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