If the lady doesn't start a convo with a match within 24 hours, the chat disappears forever, providing an incentive to actually make connections with people rather than just playing the "who'll make the first move" waiting game.
While it's true (and great) that many women may already feel empowered enough to send the first message, Bumble is a fun Tinder alternative for girls who are on the shy side.
(If you live in a less populated city, this may not hold true, but it still beats hanging out at the same dive bar hoping a sexy stranger will sweep you off your feet, right?
CMB functions a little differently than Tinder: You get only one match — called a "bagel" — a day, every day at noon (it sends you a push notification to let you know when it's ready).
Then you can either "accept" or "pass" on this person; if you both accept, then a chat line opens up and stays active for a week.
One more awesome thing: If you "pass" on a person, it will ask you why — presumably to make your future matches better suited to you — and then offers you another "free" bagel for the day (sometimes more than one if you continue to hit "pass").
Hinge uses your real-life network (and by "real life" I mean Facebook) to find potential matches that aren't necessarily sketchy strangers.
Hinge provides only a "select list" of matches rather than an endless amount, so the number of potential baes is more of a gentle stream than a roaring waterfall.