BingoNinja is a free Chrome add-on developed by ahalp0217. It falls under the category of Browsers and specifically the subcategory of Add-ons & Tools.

This add-on serves a simple yet useful purpose - it hides the "Bing Image of the Day" answer so that users cannot "accidentally" cheat. The Bing Image of the Day is a popular feature of the Bing search engine, where a daily image is displayed along with a trivia question related to the image. With BingoNinja, the answer to the trivia question is hidden, preventing users from seeing it before attempting to answer.

By using BingoNinja, users can challenge themselves to answer the Bing Image of the Day question without any external help or hints. This add-on adds an extra element of fun and challenge to the Bing search experience, making it more engaging for users who enjoy trivia and puzzles.

Overall, BingoNinja is a handy Chrome add-on for those who want to test their knowledge and skills by answering the Bing Image of the Day question without any temptations to cheat.