Screen time of my phone

Hello xavelo,

Thanks for choosing the Apple Support Communities. If we understand correctly, you are seeing usage on Screen Time when you are not actively using your iPhone. We can understand why you'd reach out for a solution.

It is possible that some apps may be running in the background. To turn those off, try following these steps.

Maximizing battery performance

"Background Activity. This indicates that the battery was used by the app while it was in the background — that is, while you were using another app.

• To improve battery life, you can turn off the feature that allows apps to refresh in the background. Go to Settings > General > Background App Refresh and select Wi-Fi, Wi-Fi & Cellular Data, or Off to turn off Background App Refresh entirely.
• If the Mail app lists Background Activity, you can choose to fetch data manually or increase the fetch interval. Go to Settings > Accounts & Passwords > Fetch New Data.

Location and Background Location. This indicates that the app is using location services.

• You can optimize your battery life by turning off Location Services for the app. Turn off in Settings > Privacy > Location Services.
• In Location Services, you can see each app listed with its permission setting. Apps that recently used location services have an indicator next to the on/off switch."

Cheers!