Google play books, and Amazon devices like the Kindle, have parental controls that allow parents to stop their children from downloading explicit sexual/violent books and comics.
But the Android Kindle App does not seem to have any. (Despite being a far more popular way for children to read books than either of the above).
Does anyone have a solution for this?
(I googled a lot but only got useless info: instructions for how to do it on Kindle Fire or other Kindle hardware; a family feature on Amazon https://parents.amazon.com.au/ to which you can add neither your kids Android devices nor their accounts; etc).