YouTube app is designed for all the age groups Including kids and adults. So there are certain contents that may not be served useful and appropriate for kids.
So, YouTube has designed a special app for kids named “YouTube kids” which makes it easier for children as well as parents to find the appropriate content they required.
You could download this app in both Android and IOS for free.
YouTube haven’t mentioned particular age group to use this app but children aged between 3 to 8 years old found it more suitable.
Apart from its advantages, parents should be aware as this is not an ad free app, (ads are necessary to track the age group.)
But you could even flag if you find any inappropriate content in this app.