It's safe to download the app. 주식회사패스송 is the developer of 간화자총표 that belongs to the Educational category. The average rating for the tool is 4.5 on Google Play.
This application was downloaded and installed by over 50 users and the most recent stable update was on Nov 3, 2014. You can download the setup package of 간화자총표 1.0.4 for free and have a look at users' reviews on Droid Informer. The app works fine on Android 4.0 and above.