Yes, 目標時鐘 - 番茄鐘 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.
目標時鐘 - 番茄鐘 has several in-app purchases/subscriptions, the average in-app price is 16.00 H$.
To get estimated revenue of 目標時鐘 - 番茄鐘 app and other AppStore insights you can sign up to AppTail Mobile Analytics Platform.