Not safe for kids under 18
Hinge is a dating app where users can upload and browse profile pictures and bio descriptions, including audio clips. If two users “match”, they can directly message one another. Sexual/Mature content is likely.

In-depth breakdown

Minimum Age Requirement
Messaging Capabillities
After users “match” by both approving of the others’ profile/bio, they can send direct messages, along with voice and video calling.
Location Sharing
Users can determine the radius within which they prefer to meet other users.
Parental Controls
None, though Apple and Android parental controls could be used at the device level.
Hinge markets itself as a dating app “designed to be deleted”, and follows up with users to gather data on whether first dates were successful or not. Owned by The Match Group (Like Tinder, OkCupid, and Match).