MASHABLE - Apr 25 - Dating app Bumble will require male users to reply to women's messages within 24 hours, or they lose the match. Bumble launched in 2014. Once a couple matches (through a swipe function) only women can initiate the conversation, and they have to message within 24 hours or lose the match. At that point, men are permitted to message back. Up until now, men had "forever" to do so. Now they're beholden to the same time window as women are.