Screen Time data on my iPhone inaccurate post iOS 18 update

Makuro73 Said:

"Screen Time data on my iPhone inaccurate post iOS 18 update: Since the update to ios18 the system displays screen time even for periods when the iPhone was switched off. This is especially a problem when using family mode with restricted screen time for children. Is there a fix for this (planned)?"

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Report this to Apple:

Do your Part: Provide Apple with feedback on this, letting them know about this issue.  Apple may not get back to you directly, but the more feedback they receive on this, the more they will know what is occurring, and what bug fixes to include in updates to come. Apple will know nothing of this, if you don't report it to them.

1. Go Here: Feedback - iPhone - Apple
2. Select: "Bug Report" for the "Feedback Type"
3. Comment: that this all began after installing an update. Include the URL of this thread
4. Proceed from there as necessary

Refer to the list of Categories listed below and pic 1 where Category Serial No. 1 (Social), 7 (Reading), and 12 (Others) are shown Blue, Aqua, and Orange

In this case (Pic 1), all other categories serial nos. 2,3,4,5,6,8,9,10 and 11 are Grey

Pic 1

Look at the pic 2 below a cut-out view of a screen from an earlier old post

Pic 2

Total Screen Time is a+b+c

*** There are 12 board level Categories in Screen Time

1. Social Networking: FaceBook, Hangout, Instagram
2. Games: Scrabble, PUBG, Sudoku
3. Entertainment: TV, Music, YouTube, Netflix
4. Creativity: Photos, Camera, Google Photos
5. Productivity: Shortcuts, Mailk
6. Education: SkyView, Learn Python
7. Information & Reading: Wikipedia, Magzter, Weather, Kindle, NDTV
8. Health & Fitness: Journal, Tata 1mg, HeartRate Pro, Activity
9. Utilities: App Store, Measure, Truecaller, Calculator
10. Shopping and Food: Amazon, BigBasket, Shell Asia
11. Travel: Apple Maps, Google Maps, FlightAware, Booking.com, Uber
12. Others: Pinterest, iTunes Store, Kia Connect

The graph displays the top 3 (Time used by the user) category legends on the X-axis. Anything other than these legend categories is a Grey bar in the graph

Pic 3

For example:

If the user has used Games, Entertainment & Others category apps for the maximum time during a period then the graph will show these three categories in the X axis as legends and the remaining categories will be shown in Grey Colour.

The GIF below will illustrate the graph from 3 iOS devices

iPhone 6 iOS 12.4.5

iPhone SE iOS 13.3.1

iPad Pro 9.7" Wifi+Cellular iOS 13.3.1

GIF 1