Yes, カロリー消費計算アプリ 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.
カロリー消費計算アプリ is free.
To get estimated revenue of カロリー消費計算アプリ app and other AppStore insights you can sign up to AppTail Mobile Analytics Platform.