全文 iOS应用 内置付费 IAP Store Kit Guide iOS应用内付费(IAP)开发步骤列表 前两天和服务端同事一起，完成了应用内付费（以下简称IAP, In app purchase）的开发工作。
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应用程序内部付费机制 In-app Billing
声明书来自于德克·萨斯一家叫Lodsys的公司，自称拥有四项专利，涉及应用内付费系统，交互式在线广告，在线帮助和订阅更新。
The claims come from a Texas-based company called Lodsys, which said it has four patents relating to in-app purchases, interactive online ads, online help and subscription renewals.
如果一个应用程序在七天内维持高下载量，它就会出现在“最佳付费应用”或者是“最佳免费应用”的列表中，保证它在30天内保持流行。
If an app continues to be among the highest-downloaded over that seven-day period, it will move into either the "Top Paid" or "Top Free" lists, which cover popularity over a 30-day period.
上图是由付费应用程序、付费程序中的“程序内购买”以及免费程序中的“程序内购买”的营收比较表。
A breakdown of revenue split across paid apps, paid apps with in-app purchase, and free apps with in-app purchase.
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