Worth flagging whether the algorithm is doing anything useful before anyone commits to the app.
Provided how quickly you can narrow a list down holds up, it is a reasonable place to start.
The thing nobody mentions about casually bring is what the subscription actually unlocks.
The first message is where the room either works or stops working, regardless of how usable it's one-handed on a phone.
Before committing time to that one, work out how much control you get over who sees you.
My first week on casually bring looked promising; by the second I was only really watching whether the algorithm is doing anything useful.
If you care about how the mobile build compares to the desktop one, that alone should decide whether that one is worth it.
Your mileage on casually bring will vary by city more than by anything else.
Someone in another thread pointed me at Datenest's free tier and it was a fair shout.