Slow performance and lag after iOS 26 update on iPhone

After updating my device to iOS 26, I have been experiencing significant lag across apps and system settings. The performance has dropped noticeably, making the device feel slow and unresponsive. This is affecting the overall user experience, and I would appreciate guidance on whether this is a known issue or if there are recommended steps to resolve it


[Re-Titled by Moderator]

Original Title: After updating to iOS 26, my phone has started lagging significantly across all apps and settings. The overall performance feels noticeably slower—almost like using an Android device


iPhone 11 Pro Max, iOS 26

Posted on Sep 17, 2025 6:11 AM

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Question marked as Top-ranking reply

Posted on Sep 23, 2025 11:29 AM

Jpprado232 wrote:

Nope you are so wrong. It’s the update, as soon as I updated my phone not even a hour ago, I get extreme lag and it doesn’t even run smoothly at all.
AND I HAVE A 15 PRO MAX NOT EVEN 2 years old with extra 350 gigs left

That is exactly what you are supposed to be experiencing after an update of not even an hour ago. Not only lag, but you should be seeing increased battery drain and higher than normal heat being generated from the background indexing being done.

About Apple software updates - Apple Support


You will need to give it 3-5 days to complete. The exact time is not possible to know as it depends on many factors including the size of your photo library where updated algorithms on object detection are also being done. Leave your phone on a charger all night, every night.


238 replies

Slow performance and lag after iOS 26 update on iPhone

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