LoganF is right about this and I would go a step further on singles app free of charge.
I would judge the app on how precise the filters really are rather than on the feature list.
Out of roughly 60 matches on singles app free of charge, 2 turned into an actual conversation.
Where that one works it works fast; where it doesn't, how the pricing behaves once you're invested is usually the reason.
Your mileage on singles app free of charge will vary by city more than by anything else.