All the websites I'm aware of have app counterparts now. I suspect he's talking about the ones that didn't start off as apps and allow more detailed profiles, like Match and EHarmony. And yes, they're pretty much dead. Match is somewhat viable but far less active than it was five years ago. EHarmony is extremely expensive and almost completely dead. There are maybe a dozen new sign ups per day in my entire state, and most of the profiles are dead and can't see or send messages because people balked when they saw the price, which isn't shown until you complete the (rather lengthy) personality questionnaire.

On top of all that, they're all slowly changing to the swipe mechanics of Tinder and the like. Personally I hate that model, but apparently it's "won".