Många tonåringar använder appar för att utforska sin sexualitet i hemlighet. Det kan innebära att de riskerar att bli utnyttjade eller utsatta för övergrepp.
Gay and genderfluid people from around the world sound off on the good and bad of the rise of gay dating apps.
Hopefully this helps you out.
If you send Chris a dick pic on Grindr, he'll reply with an elaborate drawing of your penis.
We asked a load of people with distinctive "looks" on dating apps about the opening lines and fetish suggestions they've received.
"I had to be so focused, so disciplined for the whole year," he said.
"I realised I had catfished myself."
A growing group of millennials is trying to make matchmaking cool again.
40-year-old Stephen Port allegedly drugged and murdered four young men in London after meeting them through Grindr.
'It's like another world.'
Despite the emergence of hook-up apps, many men who have sex with men are still drawn to seeking quick encounters the old-fashioned way.
Straight women are cruising gay male sex apps for hookups, and it's even queerer than it sounds.