They mostly appeal to men who are too chicken shit to approach women in real life. That's why so many guys keep using it even though they're widely seen as useless and a scam. Because they'd rather get nowhere on an app than to face failure in person face to face with a girl.

And the reason women don't like dating apps is because they don't treat it is as serious business as men who see it as a last resort to get laid do. They see it as a game for when they're bored, no different than having Candy Crush on their phone. That's why most women will never reply to your messages. Because they have no intention of meeting anyone on the app, unless they're hungry and want to use you for a free meal.