A free program for Android, by AllDict.
Korean-Indonesian Dictionary is a comprehensive dictionary for people who want to learn Korean or who already know Korean and want to learn Indonesian. This app can be used offline and it is completely free to download.
The dictionary contains over 200,000 words and more than 5 million sentences, which makes it the largest dictionary of its kind in the world. You can search for both words and sentences. It also has an extensive word trainer, which allows you to practice all that is necessary: your pronunciation, your reading skills, and your writing skills. The word trainer has different exercises, which makes the app an indispensable tool for learning a language.