no ad. is best
prefer to no ad. with some cost.
Yes, ヘイ二郎 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.
ヘイ二郎 is free.
To get estimated revenue of ヘイ二郎 app and other AppStore insights you can sign up to AppTail Mobile Analytics Platform.