Ok lemme add my 2 cents on the various dating apps I've tried:

Basically I'm 34 this year so I'm in the more mature market segment I guess. My looks & career are fairly average but I can write fairly well, which carries me further in some apps than others. Anyway so far my evaluation is as follows:

1. Tinder:
Looks are really important
Description isn't that important
There are plenty of bots BUT also many hotties

2. CMB
Looks are a bit less important
Description is somewhat more important
English-speaking professional ladies are somewhat more prevalent

3. Bumble
Pretty much the same as CMB
Note: many of the guys in lowyat complain about girls having to message first in Bumble. Imo this is not a bad thing, as it makes girls more willing to swipe on you (they can always choose not to message you if they don't feel like it)

4. Okcupid
Can't quite tell yet but there are seriously a lot of questions to answer in the profile

5. Tantan
Looks are more important than CMB / Bumble but less than Tinder I feel
Description isn't that important too
Seems to be populated by predominantly Chinese speaking girls, quite a few bots too I sense

I'll update more when I get more info.