Tinder is a location-based dating app that allows users to swipe, match, and exchange messages with local singles). It is primarily used by teens and young adults, and it is famous for its swipe and match feature that offers paid subscriptions. Tinder uses a "double opt-in" system, where both users must like each other before they can exchange messages). Users can swipe right if they’re interested in a person or swipe left if not. Once both users swipe right on each other, they can chat within the app. Tinder is often seen as a hookup app due to its focus on physical attraction, but it can also be used to date or form relationships. Tinder is available for both iOS and Android, and it is free to download. However, some features are only available to paid subscribers. Tinder is intended for adults aged 18+ .