Stem - an interest based social networking app

Currently Stem is in beta. It's in its early stages, with many new features to come, but has been released early to create a strong user base.

After you answer a few questions about yourself in the registration process, a unique matchmaking algorithm suggests a list of users for you to "add to your stems." Once added, you can interact with these users like on any other social network.

https://itunes.apple.com/us/app/stem-interest-based-network/id716213301?ls=1&mt=8