BingoJi is a free Japanese learning app that integrates a puzzle game to aid in vocabulary memorization. The app features puzzles based on vocabulary from popular textbooks like Minna no Nihongo, Soumatome, and Mimikara Oboeru. With Japanese words arranged in levels, users are challenged to unlock them through engaging puzzles, offering continuous additions for endless enjoyment.

The app offers a simple and interesting interface with no registration requirements or complex rules, making it easy for users to dive into learning Japanese words. Players can enjoy the addictive gameplay by deciphering commonalities among four pictures to identify the word. Additionally, BingoJi provides flexible play modes between Kana and Kanji, along with a useful dictionary displayed on the play screen for quick word look-ups.