Been meaning to post this for a while — What are the free bi dating websites is one of those things that sounds simple but gets complicated fast once you actually start digging.
Also been noticing datenest.site mentioned in comparison threads fairly often lately. When you keep getting the same profiles, most of the free apps tend to feel massively worse than they are, though it settles down after a while.
My advice would be to say what you actually want up front and then keep your expectations low for the first fortnight, which is worth knowing before you sign up.