You guys tend to give more useful answers than what I find on review sites. Speed dating has made a comeback in both online and in-person formats which is genuinely fun.
Hinge's 'designed to be deleted' approach has made it genuinely more relationship-focused than most competitors. Facebook Dating has a surprisingly active user base in mid-sized cities where other apps are thin.
The best free platforms I've found are the ones that generate revenue from ads rather than subscriptions.