So it's difficult for academics to figure out which ones do best.

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The two decided to meet "IRL" (in real life) days later. Traditionally known for reviewing products like household cleaners and washers and dryers, Consumer Reports surveyed nearly 10,000 subscribers in the fall of 2016 about online dating and then rated matchmaking sites based on their overall satisfaction.

Months after their first date, the couple discovered they had been classmates in preschool, and one year into their relationship Justin arranged to have the young students from their former school hold up signs that asked, "Will you marry me? How to boost the odds with a better profile: Use recent pictures (taken within the past year) and at least one good close-up headshot.

The claim of online dating sites is that you’ll be able to find the love of your life, or at least improve your dating life by using their service.

Some sites like e Harmony claim to have proprietary matching software that will make the process more accurate.

In a 2013 article in The New York Times, e Harmony’s senior research scientist at the time, Gian C.

Gonzaga, said that the company focused on factors such as the degree of sexual and romantic passion, the level of extroversion, and the importance of spirituality in making matches.

Dating sites are only as good as their ability to make matches.

And how they go about making those matches can be very different. D., is a professor at the Harvard Business School who was on the scientific advisory board of Ok Cupid.“They are all matching on obvious stuff, like age range," he says, "but they vary a good amount on how they consider other factors that might affect compatibility.”Sound vague? Online dating companies keep their proprietary algorithms closely guarded.

You can do almost anything online these days: Check a bank balance, buy shoes, choose a mattress, order a cab.