I'm in Saigon now, too, 1 week has been very much fun, going out every night, locals are friendly. But no sex, apps are fairly quiet, plenty of offers for paid sex, handsome guys, going by profile pics. There are no gay bars here, it seems. But local guys often smile on the streets, few times when I did try to start convo, English seems to be main issue.

One thing is for sure, Saigon is very cool city, for several years I've been too lazy to visit, always going to Cambodia for short getaways, as if on auto pilot, twice every year. No more! Saigon is better than Siem Reap, PP, and the disaster that has become of once interesting Sihanoukville.
Tomorrow going to Vung Tau, a beach resort. I will report on app action, if any.