Mobile app Friendthem announced its intentions to sue Facebook for its Find Friends Nearby feature. One that, they've already taken down.

CEO of Friendthem Charles Sankowich says he told a senior Facebook executive about his idea in February, to use smartphones’ GPS signal to track friends and potential new friends nearby.

“Friendthem is something special and we could be one of the most important apps for Facebook in a long time,” Sankowich said. “When the world understands how important our message is, Friendthem could be one of the most important apps out there, so I don’t know why they’re going around us to do this.”

The Friendthem CEO says the Facebook executive said, “I really like this idea.” after a dinner with them.

Though Facebook says the idea came from a company hackathon and was originally called Friendshake, Sankowich doesn’t believe the claim.

“They have to know about Friendthem unless they’ve had their heads in the sand,” he says. “We’re relevant, we’re necessary and we’re fun.”

Friendthem connects your Facebook account to find people near you, and you can choose what information you would like to share just so to protect your privacy. It's website gives a more detailed description: “Friendthem is a location-based mobile app designed to help you make connections with people near you. Use the Friendthem app to follow up on missed connections for work and personal.”

Which in any case, really sounds a lot like the Find Friends Nearby feature.