I struggle with this all the time, but I know I bear the ultimate responsibility for my kids' overusing devices. Maybe I should start using a timeout app. My daughter, Julia, told me a few months ago to stop putting educational apps on her iPhone. Hah, I'll just replace those with this app with a tantruming kid graphic.
From my own use and from observing my children interact with content on various Apple devices, I understand how personal the experiences can be. From choosing content to saving content to editing and creating content, it's a device that lends itself to personalization.