Yes, 熊猫宝宝游乐园-游戏乐园 is completely free and it doesn't have any in-app purchases or subscriptions.
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熊猫宝宝游乐园-游戏乐园 is free.
To get estimated revenue of 熊猫宝宝游乐园-游戏乐园 app and other AppStore insights you can sign up to AppTail Mobile Analytics Platform.