16 Apps and Websites Kids Are Heading to After Facebook

Tinder is a photo and messaging dating app for browsing pictures of potential matches within a certain-mile radius of the user's location. It's very popular with 20-somethings as a way to meet new people for casual or long-term relationships.

What parents need to know

• It's all about swipes. You swipe right to "like" a photo or left to "pass." If a person whose photo you "liked" swipes "like" on your photo, too, the app allows you to message each other. Meeting up (and possibly hooking up) is pretty much the goal.
• It's location-based. Geolocation means it's possible for teens to meet up with nearby people, which can be very dangerous.