Rean Kui is a mobile application designed to showcase the Kui language, proposed by the Organization for the Promotion of Kui Cultural (OPKC). In the application, users can view Kui words in both Khmer and English, listen to the pronunciation of each word, and watch video descriptions for each word as well. Through this app, users can learn Kui words and gain a deeper understanding of Kui culture via the introduction video provided within the app.