Last year, the firm rolled out a live-matchmaker service, e H , that cost ,000, and the firm has invested in sites shifting its algorithm to other adult arenas, as in looking for the right job.

But the site that brands itself as “a different kind of relationship company” has seen its own challenges.

Some have argued that Tinder’s model — of love (or lust) at first swipe — is actually closer to the future of online dating not just for young singles, but for daters of all ages. Finkel, a Northwestern University psychology professor who has studied online dating, has called superficiality “Tinder’s greatest asset,” arguing that the service is actually closer than profile matchmaking to that old style of dating: catching someone’s eye and, knowing nothing about their background, feeling a sense of attraction from across the room.

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They put all their money on one variable: looks,” said e Harmony founder Neil Clark Warren, a grandfather of nine who’s been married for 56 years. It’s also become increasingly addictive: The average user checked the app 11 times a day, seven minutes at a time, the firm said in 2013. It is one of several dating sites in Inter Active Corp., the monolithic New York media conglomerate, which also owns Match.com, OKCupid and a heap of shallower dating pools, including Gen XPeople Meet.com, Divorced People and Little People

Match alone has more than 2 million daters across North America, a third of whom are over the age of 50.

The service has spent more than $1 billion in advertising in recent years, largely on TV ads for older audiences far removed from Tinder’s dating pool.

“The Tinder thing is very exciting, because they’ve caught the attention of young people in America, but the only thing that’s wrong with it is what’s been wrong with dating for a thousand years. I have presided over the funerals of more marriages than any psychologist, and it is miserable.” Surrounded by rivals like Hinge, Zoosk and Wyldfire, Tinder has nevertheless tripled its user base since the start of 2014 and now reaches more than 3 percent of all active American cell-phone users, an analysis from 7Park Data shows.

But finding love on the Web has long been mainstream — 59 percent of Americans said online dating was a good way to meet people in 2013, up from 44 percent in 2005, Pew data show — and some analysts argue more and more adults will find love in the simpler, more visual way, by swiping on Tinder or somewhere else.

“It’s easier now to get married right than it has ever been,” said Warren, the e Harmony founder.

“The young ‘uns can have it.” The company defended the pricing structure as aimed at accommodating younger “budget-constrained” daters, but analysts have questioned just how many singles will pay up to find an online match.

In a February note to clients, Morgan Stanley analysts said the honeymoon period for Tinder’s “casual dating” wouldn’t last for long.

“Maybe it’s a gimmick, but it’s something that’s fun, that’s enjoyable, that doesn’t have that sort of weight that the former profile-focused matching sites had.” Like many Web startups, Tinder (motto: “It’s like real life, but better.”) has struggled to make money off its swelling audience.

Its first big ad campaign, with Bud Light, was perhaps emblematic of what it can offer millennial-aimed companies: It will allow, as Tinder’s vice president of advertising Brian Norgard told Techcrunch, the dating app to “give that data back to our brands in a really valuable way.” But Tinder’s Plus pricing has also led to blowback for what skeptics called the service’s ageist ways: “I’m not desperate enough to keep using Tinder now that I know it considers me a dried up old hag,” wrote Dani Burlison, a 41-year-old single mother, in .

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