DNA test kit just to see if me and my twin brother are identical or not?

Can these be purchased in a store? I don't want to send my sample or anything to a lab. Is there a testing method I can purchase at a chemist or something where I can determine the results myself without sending it off for analysis by a company?


I want to know if me and him are identical without giving my DNA out to anybody as I feel this is private

Pic unrelated