Yes, Hourly Beep 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.
Hourly Beep has several in-app purchases/subscriptions, the average in-app price is €7.16.
To get estimated revenue of Hourly Beep app and other AppStore insights you can sign up to AppTail Mobile Analytics Platform.