Unknown except South Africa South East Asia Tinder primary, Badoo secondary but still does the job. @frankiecred: added happn to Brasil @kidtwist & @Linux added Serbia General dynamics Tinder is taking over.
Your input on websites you use is highly valuable, we must explore all options. You might also report the results What about Tinder in Mexico? I have spent quite a lot of time due to work in Bremerhaven, NW Germany.
I must say except for some nightlife on the weekends the place is pretty much dead.
I asked my buddy, who is in Serbia, this question a while back and he informed me Serbians don't really do the whole online dating thing. However, even online is still very good here, many beautiful women on tinder although many are on there looking specifically for sponsorship or rich and famouse men now.
You might get a match here and there but don't expect much. Tinder is most used dating app in Serbia but badoo is also good for girls who are poor and live in countryside.