Kamus is an offline dictionary for both Indonesian and Arabic speakers - giving those who belong to the former an Indonesian to Arabic lexicon, and those who belong to the latter an Arabic to Indonesian word stock. Within the app's archives, you will find both popular words that should be useful for casual, real-time conversations, and not-so-popular words that will perhaps benefit you in writing… and other poetic endeavors. 

The interface is easy and user-friendly. There is a search box that allows you to type in a particular word of the other language; this search box gives you the option to listen to the correct pronunciation.