Yes, 臺灣資安大會 CYBERSEC 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.
臺灣資安大會 CYBERSEC is free.
To get estimated revenue of 臺灣資安大會 CYBERSEC app and other AppStore insights you can sign up to AppTail Mobile Analytics Platform.