JRadio JLPT N4 Vocabulary is an Android app developed by Nahu Studio. It falls under the Education & Reference category and is a free app. The app provides a unique way of learning Japanese vocabulary. The app allows you to listen to the English meaning of the word, think about your Japanese translation, and then listen to a Japanese speaker to check your answer. This way, you can learn from your own mistakes and improve your translation skills.

In addition, the app also offers a quiz to practice your vocabulary. You can mark completed lessons and check your progress by keeping a record of your quiz scores. The app has an intuitive interface, making it easy for beginners to use. Overall, JRadio JLPT N4 Vocabulary is a great app for anyone looking to improve their Japanese vocabulary.