Swipe left if you don't want to know Tinder's inner workings.

Swipe right and proceed to know the following.

Fast Company is reporting that the popular swiping dating app assigns each one of its users an internal rating of desirability. The website says that the company comes to that number by ranking the least and most desirable users swiping on the dating service.

Tinder, which doesn't make the internal ratings public information, took the revelation further, showing one Fast Company reporter his own desirability number — to his dismay.

But the number isn't a direct indicator of one's attractiveness. In fact, the app's CEO Sean Rad told Fast Company that the internal ratings should be considered more of an indicator of desirability and wanting to be seen over looks.

"It's not just how many people swipe right on you," Rad told Fast Company. "It's very complicated. It took us two and a half months just to build the algorithm because a lot of factors go into it."

Tinder's VP of product, Jonathan Badeen, even compared the ratings system to the popular video game Warcraft.

"I used to play a long time ago, and whenever you play somebody with a really high score, you end up gaining more points than if you played someone with a lower score," Badeen told Fast Company. "It's a way of essentially matching people and ranking them more quickly and accurately based on who they are being matched up against."

Swiping left on Tinder's internal ratings system or right?

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