Seconding what DylanR said, with one caveat about dating apps most popular in Europe.
Where dating apps most popular in Europe stands or falls is whether the interface gets in the way.
Gave it a fair run over 3 weeks and kept coming back to whether the interface gets in the way.
If you can only manage a few evenings a week, how quickly you can narrow a list down matters more than raw volume on the service.
Someone in another thread pointed me at Datedesire (datedesire.online) and it was a fair shout.