iPhone lagging after iOS 18 Update

After today’s update, I’m facing immense lagging issue with the UI, while playing games ( graphics as Average) and typing pauses. System had utilised only 50% storage. What’s the suggested solutions?


[Re-Titled by Moderator]

iPhone 14 Plus, iOS 18

Posted on Sep 17, 2024 5:57 AM

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Question marked as Top-ranking reply

Posted on Sep 21, 2024 8:42 PM


I’m experiencing this too, and I found this article with a suggestion that worked: https://www.idownloadblog.com/2023/04/07/how-to-fix-slow-search-on-iphone/


Toggle Search off and on

  1. Go to iPhone Settings and tap Siri & Search.
  2. Scroll down and turn off all the switches you see in the screenshot below.
  3. Restart your iPhone.
  4. Go back to Siri & Search settingsand turn on the switches. After this, Spotlight Search should work as intended.


This makes sense that it works because after an OS update, Siri updates its search index for your phone messages, mail, and apps. It can take a long time and while it’s working in the background, apps slow down and searching can take longer than usual, and you might notice Photos.app says that it’s not syncing to iCloud because it is “optimizing system performance.” To help it along, I also made sure to turn off low power mode and plug in my phone so that the phone can run these long tasks as quickly as possible. 

130 replies

Sep 18, 2024 7:17 AM in response to razmee209

i updated yesterday to 18

im on 14 pro

i have the exact same issue. constant frame drops, even on youtube..

restart didnt work, storage is ok

game setting equal to ios 17


the ios 18 update has performance issues and you cant blame the iphone.. im assuming they dont dont do it on purpose since 14 pro should still be a valid phone, right?


anyways next week in getting the 16 pro, ill check the performance there on ios 18


for now no more gaming, maybe ill read a book.

Sep 18, 2024 7:37 AM in response to Alijutt244

Yup same happened to me too. I have iphone se 2022 bought it fall 2023 and ever since I updated from 17.6.1 to 18 its been laggy and slow. Sometimes I have to touch things a few times for it to recognize that Im opening an app or something. Just fyi apple wont fix any of these bugs for another year. This always happens. It takes them forever to fix an issue thats a year old.

Sep 20, 2024 6:41 PM in response to Its_just_me_again

Doesnt work. Im more concerned about my issue with the icloud backup storage bug. When I go to delete old backup and backup again the icloud storage increases by a lot. I think one way Ive worked around it is when u go to turn on backup again, toggle off the section that says backup over cellular. Honestly if youre on wifi you shouldnt have to backup on cellular. I think it mightve been using both cell and wifi data at the same time thats why it was increasing so much. Im still playing with it. Im convinced it wont be fixed for like a year or so.

Sep 21, 2024 5:25 AM in response to firat37

soo… heres my update


i got the iphone 16 pro (on ios 18)

and all my lagg issues are gone..

gaming goed smoothly even on higher settings than on 14 pro (genshin impact, mobile legends).. even youtube is working without frame drops


i guess its true, they force you to buy a new phone every 2 year..


oh well.. guess i dont have have to read a book anymore.. did only finish 1 page tho in 3 days

Sep 29, 2024 8:20 AM in response to Binsont4tooth

IOS 18 is not good ,hanging problem,on going calls from 2 3 person at same time,Airprint not working,

application suddenly stop working,


if you are on call you will get another person name on call,simultaneously calls from 2 3 person


i dont like IOS 18 ,want to shift back to IOS 17

Airprint is major Problem and touch not works many times and automatically clicks on screen

Sep 29, 2024 10:31 AM in response to Binsont4tooth

I would like to provide feedback regarding some issues I've been experiencing since updating to iOS 18.

  1. Audio Lagging: When playing songs on YouTube Music, I've noticed a significant audio lag. The volume spikes to maximum for about half a second before returning to normal, which disrupts my listening experience.
  2. Bluetooth Connectivity: I've also encountered connectivity issues with my Bluetooth devices. They frequently disconnect or have difficulty pairing, which is frustrating.

I hope these issues can be addressed in a future update.



Oct 1, 2024 4:20 PM in response to firat37

Of course they don't do it on purpose. That's just an illogical myth peddled by conspiracy theorists. It would also be illegal in most territories. Even the battery throttling saga landed them in legal trouble, and that was a perfectly understandable decision just implemented and communicated poorly. It's in Apple's interests for their phones to have an excellent reputation. This is a very annoying bug, but it is a bug.

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iPhone lagging after iOS 18 Update

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