https://sci-hub.se/https://doi.org/10.5964/ijpr.v3isupp2.78

Marriages resulting from the online matchmaking service were observed to have significantly higher scores for marital adjustment. We conclude that online matchmaking services based on predictive inference and proscribed selection can be observed to have a significant and meaningful impact on marital quality

https://www.pnas.org/doi/abs/10.1073/pnas.1222447110

marriages that began on-line, when compared with those that began through traditional off-line venues, were slightly less likely to result in a marital break-up (separation or divorce) and were associated with slightly higher marital satisfaction among those respondents who remained married.

I remember the slightly gooder old days when OKCupid was the dominant dating "app" (because it was a website). You answered a ton of survey questsions ranging from serious philosophical and political question to silly personal preferences and weighed how important they were to you, then the website matched you with people who had similar values. You could write a big complicated profile if you wanted, upload some pictures. There were fun, silly quizes to take. It was actually designed to be user friendly and help you find people who had similar interests and values.

That was my experience years and years ago.

I don't even know what changed from there but I know it's gotten worse since the site was bought and rebought by larger and larger techbro corporations after I left. Actually successfully dating isn't as profitable as keeping people around, and they learned that well.

They also published various funny/depressing statistics on their blog, worth a look if you're into that sort of thing