So, can someone correct me if I'm wrong? It appears that Amazon Cognito handles sync for local device data, but the developer doesn't have access to any of tha

So, can someone correct me if I'm wrong? It appears that Amazon Cognito handles sync for local device data, but the developer doesn't have access to any of that data. Correct? So this service seems to be geared toward developers who don't want to store or see user data at all. But for a developer that wants to gather user data (for crowdsourced insights) or for a developer that wants to offer a web app connected to their own DB, then this isn't going to work.