“Total records" for iOS Device Doesn’t Match the Detailed Report
On iPhones and iPads, the Detailed Activity Report usually shows fewer records than the Total Records number. You'll see the Total Records number on the Reports page and in report emails.
Here's why: Apple only lets us record details in major web browsers, like Safari and Chrome. You may also see details from browsers inside other apps and from YouTube. We still track most apps and add them to your App Usage Report. But those records have limited details, so they don't show up on your Detailed Activity Report.
So, if your Detailed Activity Report shows fewer records than the total at the top (see screenshot below), the user likely used other apps too.

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