If you are on Android devices, I can recommend the Family Link app @heather75
You can control how long she spends on apps as well as the phone itself, new apps have to be approved by you and you can control which websites she can visit.
(Not sure if this link will work, but here goes...)
https://play.google.com/store/apps/details?id=com.google.android.apps.kids.familylink&hl=en_GB&gl=US
Please note, this is not customer services and we cannot access your account. Do not publish personal details (email, phone number, bank account).
Link to our guide on how to contact them can be found here
