Yes, 汽车教练员题库 is free to download, however it contains in-app purchases or subscription offerings.
Not enough reviews to make a reliable assessment. The app needs more user feedback.
汽车教练员题库 has several in-app purchases/subscriptions, the average in-app price is 477.10 ฿.
To get estimated revenue of 汽车教练员题库 app and other AppStore insights you can sign up to AppTail Mobile Analytics Platform.