Poor optimization of iOS 26 on iPhone 13 Pro

Performance and animation issues in iOS 18


Noticed a serious problem with system optimization after upgrading to iOS 18. The device began to slow down noticeably: — Animations became sharp and jerky; — Applications take a very long time to load (for example, Safari); — slowdowns are noticeable even when simply scrolling through the home screen, especially on those pages where many applications are installed; — The system also runs slowly when the device is rebooted. It becomes especially critical when the power—saving mode is turned on. In this case, it is almost impossible to use the phone: everything scrolls extremely slowly, the scroll "lags", and animations are barely noticeable or absent altogether. Previously, before upgrading to iOS 18, there were no similar problems — the system worked smoothly and responsively even with power saving enabled. I would appreciate any advice or information on whether these symptoms are related to known bugs in the current version of iOS.

iPhone 13 Pro, iOS 26

Posted on Sep 28, 2025 6:57 AM

Reply
1 reply

Sep 28, 2025 10:30 AM in response to Paul_onekkk

Paul_onekkk wrote:

Performance and animation issues in iOS 18

Noticed a serious problem with system optimization after upgrading to iOS 18. The device began to slow down noticeably: — Animations became sharp and jerky; — Applications take a very long time to load (for example, Safari); — slowdowns are noticeable even when simply scrolling through the home screen, especially on those pages where many applications are installed; — The system also runs slowly when the device is rebooted. It becomes especially critical when the power—saving mode is turned on. In this case, it is almost impossible to use the phone: everything scrolls extremely slowly, the scroll "lags", and animations are barely noticeable or absent altogether. Previously, before upgrading to iOS 18, there were no similar problems — the system worked smoothly and responsively even with power saving enabled. I would appreciate any advice or information on whether these symptoms are related to known bugs in the current version of iOS.

And what troubleshooting steps have you done?

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Poor optimization of iOS 26 on iPhone 13 Pro

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