Korean is easier than Japanese... I tried the free version first, until chapter five. But I wanted to learn all the possible sounds. Im living in Japan and that was all I was looking from Korean language. For people planning to travel shortly to korea, you dont wanna miss the underground station or the name of the famous place.
I finished all the chapters and I have to admit though... Maybe I will never use this app anymore.
Godi37 about Korean Letters, v1.0.8