Most of us have many different account types linked to our iPhones and iPads. This includes sign-ins for email, contacts, calendars, and even services like iMessage. If you let a small child use your iPhone or iPad, it may be a good idea to revoke the ability to change and alter accounts while restrictions are enabled. This way you never
How to block the ability to change accounts with iOS parental controls
Launch the Settings app on your iPhone or iPad.
Tap on General.
Tap on Restrictions.
Tap on Enable Restrictions at the top if they aren't already. If they are, skip to step 6.
Choose a 4-digit passcode that only you will know. Your child should never know this password.
Tap on Accounts under the Allow Changes section — it's close to the bottom of the page.
Tap on Don't Allow Changes.
That's it. No one will be able to change accounts unless they turn off restrictions first.