AppStore touch id misbehaving
On my kids' iPhones the AppStore always forces them to authenticate by typing their password when purchasing - whereas on ours we can simply touch id away... all of our devices are setup identically to allow touch id for iTunes & App Store. How may I fix this?
Also, used to be that we could Approve a kid purchase simply by Touch Iding - but now we have to type the password instead - no option to Touch Id even pops up anymore - what setting may I revert to, to get it to work again?
Thank you.