Sino Korean Keyboard does NOT collect any private information. The message that pops up when you first install this keyboard is from Google, you about potential danger in installing third-party apps, and it shows up whenever you install ANY keyboard on your device.
It's safe to download Sino Korean Keyboard. Dongyon Kang is the creator of this application which is related to the Tools category. The overall score for the app is 3.8 on Google Play.
Over 1M users set up Sino Korean Keyboard and its most recent update was released on Mar 4, 2018. There are adverts in this application. It's free of charge to download the installation package of Sino Korean Keyboard, also, you can take a look at users' reviews on Droid Informer. The app works fine on Android 4.0 and higher.