After transitioning from the clicking function Tinder initially used, Tinder became the first "swipe app", now a term to describe various apps that use swiping left or right to control what content the user sees in a browsing fashion.
Companion apps were being developed by different companies allowing users to, for example, use the user's heart rate to determine which direction to swipe instead of the user swiping with their hands.
The main companion site for Tinder has been Facebook, as Tinder users connect their Facebook profile to their Tinder accounts for verification and profile details.
"Most of my friends -- when they would tell me stories, they are not good stories about dating online. I went on the date with Corey first and canceled the other date," Levine says.
Exponential growth In less than two decades, online dating has soared and is "in the growth phase of its economic life cycle," says an IBISWorld report.
Though 18- to 29-year-olds make up the biggest chunk of users, with 30- to 49-year-olds next in line, demand is expected to increase with the north-of-50 crowd, too.
Arseniuk, a writer in New York, plunged into both about six months ago after the end of a three-year relationship. "I could be at a coffee shop or meeting a girlfriend and she's running late, so I could fire up the app and see who's around," she says.
"It's kind of a good supplement to the more traditional Web-based dating sites.