What is your region? Living in past in Europe, US and as well as Asia now each region is slightly differnet and some apps are more popular than the others.
In general I would say tinder (hookup), bumble (normal dating), Plenty of fish (serious dating, useful when older, marrying, kids soon).
That being said you will find all 3 categories in any app but ratio of people in those categories will be different based on app.
For example even Tinder allows you to select, if you are looking shortterm, shortterm open to long, longterm, longterm open to short, just new friends. Same you see what other person is looking for. I found this very convenient to weed out people I might not be interested and who are looking for something different than I.