JMurphy35 covered most of it. The bit I would add on sex apps is below.
What separates sex apps from the rest of the field is how many profiles logged in this week.
Ran that one alongside two other options for a month, tracking how the chat behaves on a weak connection.
Given how whether the recommendations improve with use behaves, I would only recommend the site to someone with patience.
The signals that told me most about sex apps:
Ended up splitting my time between this and DatingFly's free tier.