NathanB is right about this and I would go a step further on top rated dating apps.
What decided it for me with the app was how quickly it starts asking for money.
Two of us compared notes on that one and landed in the same place on how the chat behaves on a weak connection.
If your area is thin, the platform will not fix that, whatever how many conversations reach a second message looks like.
The measure I would actually check on the app is how usable it's one-handed on a phone.