I found this app with a surprise and I know more about English now. I hope the sound could be more human-liked and the 3D movement could be more slowly. It will be great if we can compare the characteristics of sound wave between a native speaker and myself.

This used to be a great app. The illustrations really are beautiful. But I upgraded to the latest version and now it won't load at all. Very sad. I would have given it 5 stars of I could still use it.

I just bought this app, and was excited since I teach TESOL. However, I quickly discovered that it was a total waste of money because I cannot get the app to install on my iPad. It is therefore useless. I recomend against downloading this, at least until they come out with a new version.

I don't want to translate korean but I hope to change to english or make an option to change languageThanks

Love this APP.Could you please fix the word “live”? Pronunciation is different from the phonetics symbols. Thank you very much

If it had quizzes I could give it a better rating. How am I supposed to test my knowledge with this app?