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 Jul 29, 2026 7:41 AM

Sorry to see you're having issues after iOS 26.

I had no issues with iPhone 11 with either 26 or any point updates.


Barring hardware (storage) issues, I can only suggest you do the following.

  • Back up your Photos to either a computer or iCloud
  • Back up any files or application content to either a computer or iCloud
  • Reset you iPhone (Erase Content and Settings)
  • Set up as new (do NOT recover from the whole iPhone Backup - the first two bullet points do NOT mean "iPhone Backup to iCloud" feature, they mean you use iCloud sections to save Photos or Notes and any other content to iCloud, or hook it up to a Mac/PC and use Finder/iTunes as the backup tool for sections - not the whole device.) This is needed to "lose tail" of old and potentially corrupted Preferences.
  • DO NOT install social network apps yet
  • Restore Photos and bring back other content using iCloud "Save" sections or iTunes/Finder. Do NOT use "Restore Device / Recover iPhone" features that bring everything at once, including possibly corrupted Preferences or content.
  • Observe behaviour for 2-3 days (leave it charging overnight so it indexes your content).
  • Please report if this helped

The final steps involve installing social network (Meta) applications that are known to pervasively observe you. Do this little by little, only when you have established what the "clean" behaviour is like, so you have a baseline to compare to. Notice which apps slow it down. Consider deleting the apps and using Safari to respectful websites instead. You can Pin to Home websites like Facebook and X.


If your 'clean, no 3rd-party apps' iPhone works fine, this was not a hardware issue. If it does not, consider calling Apple, they can perform remote hardware diagnostics over internet even while you're on the phone.


Remember to do the first two bullet points properly if you're not OK with losing some of your data.


If this helped, suggested root cause is filesystem or file corruption. I have seen this happen with older versions, not sure how much had been fixed since. But the method above can give you "new iPhone feeling" assuming you will NOT restore iPhone but set it up as new and bring content only.

378 replies

Dec 16, 2025 8:43 AM in response to Giacomo_Saccone

Giacomo_Saccone wrote:

Is it possible to downgrade?

Asked and answered.

I will never update before checking positive feedbacks.

While it's certainly a good plan to wait a bit before updating, comments on technical support forums will almost always skew negative, as they are places for people to come with problems. The larger group, the people without problems, aren't posting anything.

Dec 16, 2025 9:12 AM in response to haadee

I also am not happy with this new IOS. Just opening mail or messages causes serious lags in loading content or simply not loading at all and having to close and reopen the app. It also seems and has been in previous IOSs, to be less intuitive requiring more steps to complete the same tasks. Then the layout of controls on safari and other apple apps is difficult to navigate with way too many hidden actions. Finally, the liquid glass should have never made it thru beta testing and obscures the clean look apple products typically have. This is by far my least favorite update. Please fix it.

Dec 18, 2025 4:56 AM in response to William Donelson

I don't know why Apple acknowledges this should have been done better. Exactly in the same boat. It's not an 'momentum' after an initial update. It's a very very bad update and it should be fixed.

Also Apple should make it possible to revert back to the previous OS.

The keyboard-lag or random skipping is a disaster and should be done first.

The general lag - i'm sure they can fix it. I rater have LESS functionality and a functioning phone than this terrible update.

Dec 29, 2025 6:59 AM in response to haadee

The iOS 16 update has completely disrupted all of my devices. My calendar is filled with nonsense events,birthdays and appointments showing in 1601, averaging 10–25 fake entries per day, making it unusable. All my contacts were wiped out, and the Photos app is completely messed up with wrong dates, fake albums, and massive battery drain. Has anyone been able to successfully transfer their calendar, and how? Does anyone have solutions for any of these issues?

Jan 28, 2026 6:12 AM in response to haadee

By now I'm really annoyed that Apple didn't fix the lag on my iPhone 13 mini. It worked perfect on iOS 18.

I changed transparency, uninstalled AdGuard Pro because it used VPN, tried other stuff but... to be honest:

This is really a very very bad update.


Apple should sign 18.x.x again to make it possible to revert to the previous version of iOS.


For the first time in two decades I'm really considering leaving the Apple ecosystem, the current situation in the US makes Apple (services) a liability too. I don't now the English equivalent but the Dutch saying is "Reputation comes by foot but leaves by horse."


I typed this on my iMac but t y pin g this on my iPh one would mean it ads random spa ces the fact that Apple did not fix that in .1 update really deminishes the overall usability of the iPhone.

Jan 28, 2026 6:29 AM in response to AdB1973

Hi, iOS 26 and Liquid Glass are simply the design Apple has chosen to go with, for now. The iPhone User Interface has had several major redesigns in its near 20 year history. The last major redesign was iOS 7, back in 2014. We all somehow managed to get through them all. 


You may want to review the information in the article I linked to below. It explains the adjustments you can make to mitigate the effects of Liquid Glass that you’re experiencing. 


Liquid Glass - Love It Or Hate It - It's … - Apple Community


Apple’s installed user base is over 1.5 billion users. Making a single user interface perfectly compatible for every user is literally impossible. Apple will make changes (or not make changes) based partially on the feedback they receive through their official channel, linked below and good luck.


Product Feedback - Apple

Feb 11, 2026 8:14 AM in response to haadee

Agreed. I have issues as well and just unhappy in general with the things they changed that didn’t need to be changed. When you change the way something functions and call it an improvement, but it then adds extra steps to the process, like photos for example, it is not actually an improvement. It does nothing to make the phone function better. I now have to press extra buttons to get a folder to play a slideshow for example. I now have to toggle between library and collections instead of just being able to scroll down to the bottom of my photos and see all of my folders and shared folders. This has extra steps the end does not make it more convenient. Attention to Apple, we don’t need things to be changed that don’t improve the function of the phone, just so you can claim you made changes and claim they are improvements. They aren’t.

Feb 11, 2026 8:28 AM in response to Musicadisanto

Apple has changed the look of Mac OS and iOS multiple times. Every time there are those the are challenged by the changes in appearance and functionality of some aspects of the User Interface. This is nothing new. 


Apple’s installed user base is over 1.5 billion users. Making a single user interface perfectly compatible for every user is literally impossible. Apple will make changes (or not make changes) based partially on the feedback they receive through their official channel, linked below and good luck.


Product Feedback - Apple


Apple and Apple Support do not participate in the communities here. They only moderate our posts to insure all user guidelines are followed in regard to content and user behavior. Your thoughts and feelings will not be reviewed by Apple. 


You may want to review the information in the article I linked to below. It explains the adjustments you can make to mitigate the effects of Liquid Glass that you’re experiencing. 


Liquid Glass - Love It Or Hate It - It's … - Apple Community

Slow performance and lag after iOS 26 update on iPhone

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