True about millennials and Gen Z, but "millennial" now acquired the meaning of "ungrounded young people". It depends on what you call a "market". Real dating apps charge fees and don't have hidden agendas like Facebook (rule the world and sell your data to advertisers) - that's what I call a "dating app market". Sifting thru photos is not really dating - especially Instagram and Facebook photos, which, in most cases, are twisted reality.

As a millennial a few years shy of hitting 30, I find your rounding up a bit too generous. That aside, I’d still say that the prime Tinder age group is millennials.