Yes, ฝึกอ่านเขียน ก-ฮ is completely free and it doesn't have any in-app purchases or subscriptions.
Not enough reviews to make a reliable assessment. The app needs more user feedback.
ฝึกอ่านเขียน ก-ฮ is free.
To get estimated revenue of ฝึกอ่านเขียน ก-ฮ app and other AppStore insights you can sign up to AppTail Mobile Analytics Platform.