You know that moment when you lock eyes with someone across the room? Your heart starts to race, and it skips a beat or two.

Dating app Once knows this, too, and it wants to track your heart rate to help you find your next potential date.

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The app (iOS and Android), which Mashable reported on after it launched late last year in France, is a modern-day matchmaking service. Real human matchmakers use several criteria to present users with one person a day, which they can accept or decline within 24 hours.

On Tuesday, the company released a video detailing its latest feature. The app connects to your Fitbit or Android Wear device and measures your heartbeat as soon as you look at the profile picked out for you.

“If your heart races, then we can suggest people of similar physical and social attributes to you because your heart can not lie,” the narrator says in the video.

The matchmakers already use criteria like interests, looks and personal preferences, so the heartbeat is just another way they can understand who users are attracted to. You can still use the app if you don’t have a Fitbit or Android Wear tracker.

To enable the heartbeat feature, scroll down to the bottom of your profile page, click the gear icon to access your settings. Under Account, you’ll see Heartbeat. Click Activate, and you’ll be prompted to connect it with your device. In the Fitbit line, the feature only works with the Fitbit Charge HR and Fitbit Surge.

While the concept might sound cliché at first, it's a pretty cool way of gauging attraction. And there is some truth to the way your body reacts when you see someone you're interested in.

In an article from Loyola University's Stritch School of Medicine, Pat Mumby, co-director of Loyola Sexual Wellness Clinic and a professor, discusses what falling in love does to to our hearts and brains.

"Falling in love causes our body to release a flood of feel-good chemicals that trigger specific physical reactions," Mumby said. "This internal elixir of love is responsible for making our cheeks flush, our palms sweat and our hearts race."

It’s an interesting way to bring that physical feeling into the digital space of dating, and it’s less of a gimmick than other ways tech companies have tried to incorporate your heartbeat. One example is Pillow Talk, a device that lets you send the sound of your heartbeat to a long-distance partner or family member while they fall asleep. Similarly, the Apple Watch’s Digital Touch lets you send a heartbeat so someone can see and feel it.

Once is still in its early days as a dating app, but its interest in tackling “dating fatigue” and slowing down the absent-minded act of swiping on other apps could be headed somewhere. Some hopeless romantics might enjoy a potential match per day, and even better yet, knowing how your heart really feels.

BONUS: Using emoji can help your chances of scoring a date. Here's why