I did you a favor, a quick search. Grindr is geared toward same-sex attraction and launched in 2009. Tinder followed in 2012 for opposite-sex attraction. They are similar in purpose, but their designs are different. Tinder displays one person at a time, while Grindr presents a grid of active users, listed in order of proximity.
- As a verb, from Latin preposition in + verb filtrate, back-formation from filtration or else from Medieval Latin filtratus, from filtrum, meaning felt
- As a noun, a substance that passes into the bodily tissues and forms an abnormal accumulation, “liquid that has passed through a filter,” by 1840; perhaps modeled on French infiltrer (16th century) or in the military sense of “penetrate enemy lines” attested from 1934
I’m not an enemy. Drop dead!