No revenue estimate for the App Store: Apple publishes no install counts, and its star-rating counts don't calibrate to sales the way Steam's written reviews do. Reviews and prices only.
丫丫开火车
丫丫这次扮演的是个火车司机！丫丫分别去农场、果园和动物园去帮忙运送小动物、蔬菜和水果到不同的地方。通过语音和图形提示，全部选择正确后，火车会开动喔。这是个很有趣味性的学习娱乐游戏，有利于学习进步.
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Price over time on the United States storefront, quoted in USD — from our own daily price tracking. Other markets are listed under "Price by market" in the Prices tab; they are not on this axis, because one line cannot be two currencies.
Showing the last 90 days (the review-based charts: the last 4 monthly points). Full history and CSV export come with a free account.