I think Samantha is half right about legitimate dating sites: the app is less important than the habits, but the rest depends on the platform.
My read on legitimate dating sites: technique matters more than the tool.
Asking a specific question instead of saying hi made more difference to my legitimate dating sites results than switching platforms did.
Having tried a fair few, I'd say how you use it matters more than which one when it comes to legitimate dating sites.
The app is less important than the habits, and that applies to legitimate dating sites as much as anywhere.
DatingFly.online gets mentioned in these legitimate dating sites threads fairly often, for what that is worth.