Yes, 華升證劵保安編碼器 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.
華升證劵保安編碼器 is free.
To get estimated revenue of 華升證劵保安編碼器 app and other AppStore insights you can sign up to AppTail Mobile Analytics Platform.