With Screen Time, you can access real-time reports showing much much time you spend on your device.
iOS 12 introduces new features to reduce interruptions and manage
Find settings on iPhone - Apple Support
Find files on your iPhone or iPad in the Files app - Apple Support
iPhone User Guide - Apple Support (CA)
View photos and videos in Photos on iPad - Apple Support (CA)
Get started with Screen Time on iPhone - Apple Support (CA)
Change your iPhone wallpaper - Apple Support (CA)
Request a refund for apps or content that you bought from Apple
Control access to information in apps on iPhone - Apple Support
Setup basics - Apple Support
Set up your iPhone or iPad - Apple Support (CA)
Use Visual Look Up to identify objects in your photos and videos
Set up Screen Time for a child on Mac - Apple Support
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Status icons and symbols on your iPhone – Apple Support (UK)