똑똑 한글단추 is an Android app developed by 교원 that aims to introduce young children to the Korean language in a fun and engaging way. The app follows a curriculum designed for the developmental stages of children, progressing from word recognition to character and sentence learning.

One of the unique features of 똑똑 한글단추 is its integration of smart images. Before reading a book, children can scan the smart image on the front cover to participate in interactive activities related to the words in the book. This helps to generate interest and curiosity. After reading the book, children can scan the smart image on the back cover to complete a final activity.

To use 똑똑 한글단추, simply launch the app and scan the smart images on the front and back covers of each book. The app will then provide various learning contents for Korean language study.

Please note that the app requires certain permissions, such as access to the camera for book recognition and photo registration, as well as storage access for content downloads. The app is currently supported on Android 9.0 (Pie) and above.

Please be aware that developer contact information is not provided in this review.