Yes, CrocBLOCK - Safari Ad 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.
CrocBLOCK - Safari Ad has several in-app purchases/subscriptions, the average in-app price is $1.99.
To get estimated revenue of CrocBLOCK - Safari Ad app and other AppStore insights you can sign up to AppTail Mobile Analytics Platform.