This allowed them to see which tags were associated with photos with lots of likes.
Images featuring sports were shown to increase the chance of a like by 75 per cent, which those featuring nights out increased likes by 74 per cent.
But help is at hand, as Hinge has released data on the most successful photo practices.
The findings suggest that women should smile with their teeth, men should avoid looking away from the camera, and no one should share a bathroom selfie.
We are not saying take "glamour" shots or posed studio shots, because they won't reflect the relaxed you.
But [do use] a terrific head shot or even head/shoulder, that has you looking inviting and approachable.
In the end the right person will accept you for who you are, baggage and all.'Profiles with 100 to 200 words received 10 per cent more messages, and users with positive identifiers such as confident and outgoing, received 23 per cent more incoming messages and 4 per cent more replies to their outgoing ones.
You can have everything going for you -- great job, no kids, never married, and sporting an appropriate number of teeth -- and one bad shadow, receding hairline, or misplaced background can render you undateable with one swipe. Researching profile photos has surfaced bizarre information, like the fact that the most popular guys show the left side of their faces and demonstrate pride.
"The photos have to be 400 by 400 pixels for the site, but Mary Beth hadn't used this photo because it was too small, even though it's a great one of her," Hoehn said.
"If a photo is too small, but you feel it's one you want to use, don't be afraid to add a border to make it work.
Or that the most-matched women appear happy and (perhaps unsurprisingly) show some skin.
But aside from panned-out shots providing a sense of your real size and hiding the right side of your face, there are lots of little tricks you can use while actually taking the photo that can be the difference between a swipe left or right.