My current and most of my more recent relationships started from tinder, which has been more or less the “default” at least here in my age group (20-30). A few were from Jodel or such in between, but I’ve had most luck with the swipey app. Both poly and mono, depending on the phase I was going through at the time.

I think at least most of my friends have met their partners (most being long term by now, with children and such, like mine too currently) that way. But I live in a relatively small country, so maybe that affects the spread in the apps. When you are just a few million people in total speaking the language, there’s not much sense I suppose to spread thin between several apps.