If you are looking for a comprehensive and easy-to-use offline dictionary app for your Android device, then Dictionary Korean Vietnamese by NDT is the perfect choice. With a database of nearly 50,000 Korean-Vietnamese and over 22,000 Vietnamese-Korean words, this app provides an extensive collection of words that are regularly updated with their meanings.

The app has an attractive interface that makes it easy to navigate. It also comes with an automatic saving feature that stores the 150 latest words in your search history. Additionally, you can save and delete your favorite words in the "Saved Words" feature.

Please note that you need to install a Korean keyboard before using this app. If you have any feedback or suggestions, you can contact the developer at Overall, Dictionary Korean Vietnamese is a reliable and useful app for anyone who wants to improve their Korean or Vietnamese language skills.