My iPhone 13 Pro show 60fps when 13 Pro has a 120fps display

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My iPhone 13 Pro show 60fps when 13 Pro has a 120fps display

I bought a Refurbished iPhone 13 Pro and the screen only goes to 60hz, i tried Testufo.com and it says 120fps but it seems exactly the same as the 60fps (tested with 240fps slow motion video), i also tried scrolling next to a 90hz phone, and the 90hz is waaay smoother. I have limit frame rate off and Low power mode off. Could the screen have been replaced with a fake one? idk cause i have the true tone and auto brightness features

[Re-Titled by Moderator]

iPhone 13 Pro, iOS 18

Posted on Jan 1, 2025 1:22 PM

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Servant of Cats

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Jan 1, 2025 10:17 PM in response to Vaxcity

The ProMotion feature on that phone means that apps can render content at a refresh rate of up to 120 Hz – not that they must, or should, always do so. Apple's documentation also says that an app "can't force a ProMotion display to show content at any particular frame rate."

Optimizing ProMotion refresh rates for iPhone 13 Pro and iPad Pro | Apple Developer Documentation