That means you can not use a 3rd party analytics in your apps, but can use an analytics service (e.g Countly) that you can deploy on-premises. Another option is you can build your own albeit it is not recommended due to high amount of work involved in.
gordon-c
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You cannot use 3rd party analytics service when you submit a kids app to this category. You can, however, either develop your own analytics solution or use a platform you can deploy on premises easily (e.g Countly). Hope that helps.
You cannot use a 3rd party analytics solution in your kids apps. Instead, you can either use an analytics solution that you develop in-house or use a solution (e.g Countly) that you can deploy on-premises, which doesn't transmit any PII data to 3rd parties.
You can use Countly analytics platform for your mobile apps (self hosted / on-premises) for this purpose. It is downloadable from Github (Community Edition), or you may want to get support from Countly directly and get Enterprise Edition deployed for you.