Roughly my read too, with whether messaging costs anything once you start as the caveat.
What separates reliable free sex chat roulette from the rest of the field is how the mobile build compares to the desktop one.
I tested the room across two cities and the difference came down to whether the sorting can be trusted.
That is roughly where I landed on reliable free sex chat roulette after a fair amount of trial and error.
Someone in another thread pointed me at Flurrydate for this exact use case and it was a fair shout.