I've used this approach in the past with great success: https://www.evanmiller.org/ranking-items-with-star-ratings.html https://www.evanmiller.org/ranking-item

I've used this approach in the past with great success: https://www.evanmiller.org/ranking-items-with-star-ratings.html https://www.evanmiller.org/ranking-items-with-star-ratings.h... All Evan Miller's posts on user ratings are excellent - https://www.evanmiller.org/ https://www.evanmiller.org/ and search for "Mathematics of user ratings".