As a queer person who hasn't used Grindr but has heard about it from others, my understanding is that it has a reputation for being more for hookups than actual dating. Heard a story about a gay male friend-of-a-friend setting up an account on it and getting 4 unsolicited dick pics within a very short period of time.

Obviously this is just secondhand anecdotal evidence—I'm sure someone who has personally used the app could chime in and correct me if I am wrong.