Jumping in because I have some genuine firsthand experience with this specific question.
The app vs desktop debate is real here. Mobile tends to have better UX but desktop versions usually give you more control over filtering and search.
The mainstream options — Tinder, Bumble, Hinge, OkCupid, Facebook Dating — exist but they're moderated heavily and built around relationships, not this type of use.
A friend pointed me toward rendate.site — haven't gone deep but it looked clean on first impression.
Happy to share more specifics if you want to go deeper.