Yes, フランス語 翻訳(音声 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.
フランス語 翻訳(音声 is free.
To get estimated revenue of フランス語 翻訳(音声 app and other AppStore insights you can sign up to AppTail Mobile Analytics Platform.