우리말 공부 is not free (it costs 3.99), however it doesn't contain in-app purchases or subscriptions.
Not enough reviews to make a reliable assessment. The app needs more user feedback.
The price of 우리말 공부 is 3.99.
To get estimated revenue of 우리말 공부 app and other AppStore insights you can sign up to AppTail Mobile Analytics Platform.
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