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Yes, PPET知识在线 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.
PPET知识在线 has several in-app purchases/subscriptions, the average in-app price is SAR 22.66.
To get estimated revenue of PPET知识在线 app and other AppStore insights you can sign up to AppTail Mobile Analytics Platform.
停在密码没反应