Danny Boylen, a personal chef in Washington, D.C., was enjoying a cigar at a rooftop bar one summer evening when he wished for some company and — poof! — it appeared.

The genie, in this case, was the OkCupid app on his cellphone, where he “broadcast” his request to members identified, via their phones’ GPS functions, as “Locals” who happened to be nearby.

As people increasingly pursue online dating through mobile phones — 25.3 million people accessed personals sites through mobile devices in December, versus 21.3 million through a fixed computer, according to comScore, a leader in analyzing digital audiences — a slew of location-based dating apps are capitalizing on GPS to match daters based on proximity, skipping the more formal back-and-forth correspondence of some sites in favor of meeting right here, right now.

SinglesAroundMe, which features a map with drop pins showing where nearby singles are, recently launched an “approximate location” option that lets users displace their coordinates by 1 to 2 miles.

Tinder scours a user’s Facebook connections to see which friends of friends are single and nearby and invites users to give each profile a thumbs up or down, alerting both people only if both have expressed interest.

MeetMoi sends members a push notification if a match is in the vicinity, getting no more exact than “within .2 miles,” and only if both parties agree to chat does the app allow a connection. They have an hour to decide before the option disappears.

“I like that you get right to the point,” said Allison Schaffer, 22, who works in online marketing in Chicago and has met several men through MeetMoi. Schaffer said the limited window to chat forces you to exchange contact information, usually Facebook pages, so you can learn more about the person before meeting up.

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