A lot or a little?
Parents need to know that Zynn is a video-sharing app that pays users to recruit other users and spend time in the app. It has no privacy settings (beyond blocking users), so everything posted is public. Points earned in the app can be redeemed for gift cards or PayPal (though the cash-out option for PayPal is frequently unavailable). Direct messaging isn't available, but users can comment on other's posts. The privacy policy outlines the long list of information the app collects from your device, which includes apps and file names, the pages you view before and after accessing the app, your location, and -- of course -- whatever account numbers you hand over. Read the developer's privacy policy for details on how your (or your kids') information is collected, used, and shared and any choices you may have in the matter, and note that privacy policies and terms of service frequently change.