New research suggests 30% of Tinder users are married - and another 12% are also in a relationship.

Admittedly the pool of people asked in the survey, carried out by GlobalWebIndex, is quite small - 621.

The company's CEO Sean Rad says Tinder isn't just a dating app anyway - it's a "social discovery platform".

Now, meet Lilly, the single woman Newsbeat spoke to, who went on a date with a married man after she swiped right.

Alex [not his real name] was charming, outgoing and confident. And he was single (or so he said).

They'd matched on Tinder and had been chatting for a couple of weeks.

"He never text me in the evening which I thought was weird," Lilly told Newsbeat. "But he said he always went to bed early because of work."

They went on a date but Lilly wanted to find out more about Alex.

"He told me he got divorced last year and wouldn't tell me his surname, so I wasn't able to look him up on Facebook," she said.

After a bit of detective work, she tracked him down. His profile picture showed him with a woman.

Fine, she thought. Could be a sister or friend, right? Not quite.

More photos showed "the couple" celebrating their anniversary on holiday the week before.

"I confronted him but he blocked me straight away," Lilly said.

So, not great for all the singles out there seeking some form of romance.

In a statement Tinder told Newsbeat: "We get hundreds of success stories emailed to us every week about a new engagement or a marriage.

"Tinder is a social network and these are many uses for it - not just dating. People are using it to make new friends, to network, and they use it when they travel to meet new people in the area."

Although Lilly said this research is "pretty shocking", it hasn't put her off dating guys she meets online.

"I can read the signs now. If the guys are coy about social media then that's a big sign because everyone is on some form of social media," she said.

And as for Alex?

"He tried to charm me three weeks ago on the dating app Happn."

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