Depends on the reason you need to request gender, but for in-app pronoun purposes, I'd do: [ ] male [ ] female [ ] non-binary [text box for other] And

Depends on the reason you need to request gender, but for in-app pronoun purposes, I'd do: [ ] male [ ] female [ ] non-binary [text box for other] And use "they" pronouns for the last two options. (Ideally you'd allow the user to specify the pronouns themselves, but even among people who use non-conventional pronouns, getting them to correctly enter the subject/object/possessive cases of their choice is heavily hit or miss)