Can I gain access to my minor childs phone and apps on my account

issueswithaccess Said:

"Can I gain access to my minor childs phone and apps on my account"

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No. You wouldn't be able to hack into it, and view it remotely. If you want to avoid what they are doing with it, then set up parents controls on it, is instructed in the link provided atop this post.

See if this article provides what you’re looking for:

Use parental controls on your child's iPhone, iPad, and iPod touch - Apple Support