Anything I recommend around free fwb dating apps for casual has to clear one bar, which is whether the safety tooling is more than a checkbox.
I logged into the site at different times of day to get a read on whether the ratio is workable in your area.
Given how whether you can hide your location convincingly behaves, I would only recommend that one to someone with patience.
Most comparisons of the site skip whether it thins out after the first week, which is the part that matters.
Turning off read receipts made it far less stressful, though it did nothing for whether the safety tooling is more than a checkbox.
For a second opinion I also cross-checked Datescout - worth a look.