How do I fix incorrect Screen Time on iPhone after iOS 18 update?

This seemed to be happening to me as well. I believe in my case, the numbers were becoming inflated because of the StandBy feature. When I charge my phone overnight, I stand it on its side to allow it to go into StandBy mode which displays a clock and other widgets like an alarm clock. It seems like screen time is counting this towards my daily screen time. You can see in my chart where between the hours of 12-6am, it seems like the phone was in use the entire time according to the grey bar which corresponds to “other” apps.

When I contacted Apple Support about this issue, I was told it’s a known bug and the fix will be in an upcoming update. Just ignore what you see in Screen time for a short while.

Update to 18.5 and screen time is fixed for me.

you could try factory resetting the phone

When I contacted Apple Support about this issue, I was told it’s a known bug and the fix will be in an upcoming update. Just ignore what you see in Screen time for a short while.

Do you have a screen time widget on your home screen? I just out of curiosity removed it yesterday and my screen time is not bugged today. Maybe that's the culprit?

in my case, i have screen time set up across devices. it seems to be my m2 air that’s creating the ghost usage, my mini 12 shows 27+ hours of screen time today at 10:30pm. all overnight usage is “other” and if i tap through… it shows no apps or websites or anything to back it up.

Same problem on my iPhone 15. I just turn off screen time and use Opal to track it. Works much better

Same with me here, already have chatted to Apple Support, they couldn't help. I have a 15 and it's telling me i have around 12 hours per day. It happened to my iPad Air too but said i had a straight up 24h. It's definetly an iOS 18 bug.

Hello,

Yep same issue here, I've had this issue for the past few days, originally I that it was counting the apps running in the background, but then when I woke up at 2 AM, it said I was on my phone for 2 hours, apparently on Chrome, Maps, YouTube, Messages, and others, even though I was asleep and closed all the apps. Hopefully they fix/patch this bug/glitch in a future update.

My issue seems to have resolved EITHER with the 18.1.1 iOS update (on 12mini), OR with the 18.1.1 Safari for Mac update (operating on Sonoma 14.7.1), OR with both.

same story on my 15 PM. i power off every night since it’s just a habit of mine, every day i wake up and allegedly i spend 12hrs overnight on nothing. 😂 hopefully they’ll sort it out with the next ios update.