It's free to get the installation package of 단계별로 끝내는 토익 스피킹, also, you can have a look at users' reviews on Droid Informer. The app runs on Android 4.0.3 and above. This application is totally safe for downloading. The tool was originally designed by ST Unitas and it belongs to the Educational category.
단계별로 끝내는 토익 스피킹 was downloaded and installed by over 10K users and the latest stable update was on Sep 12, 2017. According to the latest information, the app is rated 4.4 on Google Play. Advertisements are a part of this application.