In the Amazon Appstore settings, there is a preference to enable
Parental Controls. When set, this causes all apps (that are installed via amazon appstore) to require the amazon password before being able to make an in-app purchase. You can also specify an optional PIN to use in lieu of the full amazon password. According to the details, this only affects in-app purchases, and it does not hide 'mature' apps or enable any filtering.
Another setting is
In-App Purchasing. This preference is active by default, but it can be disabled to completely remove the possibility of in-app purchases.
By default, no password is needed for in-app purchases, and the in-app purchasing ability is active. For both of these permissions, you are required to enter your amazon password to change the permission.
My question is this: If I disable in-app purchasing completely, is there a need to also enable parental controls?
Since the preference itself cannot be altered without typing in the password, I feel like the Parental Control preference is redundant for my purposes.