Yes, IwaGO (イワゴーお客様用) 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.
IwaGO (イワゴーお客様用) is free.
To get estimated revenue of IwaGO (イワゴーお客様用) app and other AppStore insights you can sign up to AppTail Mobile Analytics Platform.