自定义应用内计费，以避免 Android/iTunes 交易费用
我们正在计划为 iPhone 和 Android 设备开发新的应用程序。该应用程序将在两个市场（Android Market 和 Apple 的 App Store）上发布，并且免费下载。 尽管如此，该应用程序还是有一些用户可以购买的项目。最简单的方法是将每个版本与其相应的计费系统集成：Android 应用内计费和 Apple iTunes 计费系统。
有没有办法避免计费系统收取 30% 的交易费？开发人员可以为其应用程序使用自定义应用内计费系统吗？当使用其他应用内账单系统以避免交易费用时，Android 或 iPhone 是否有免责声明政策？开发人员在其应用程序中提供应用内商品购买时有哪些选项？
非常感谢！
We are planning a new application development for iPhone and Android devices. The application would be published in both markets (Android Market and Apple's App Store) and its download would be free.
Nevertheless, the application would have some items that can be purchased by the user. The easiest way would be to integrate each version with its corresponding billing system: Android In-App Billing and the Apple iTunes Billing System.
Is there a way for avoiding the 30% transaction fee from the billing systems? Can a developer use a custom in-app billing system for its application? Is there a disclaimer policy for Android or iPhone when using other in-app bill systems for avoiding their transaction fees? What are the options a developer has for providing an in-app item purchase within his application?
Many thanks!
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我们开发了多个应用程序，可将用户转移到应用程序中包含的网页支付门户。
苹果似乎对这种方法很满意，在一个特定的应用程序中，我们实现了应用程序内购买和自定义支付门户 - 他们要求我们删除应用程序内购买，因为该应用程序正在销售交易/优惠券，他们将其归类为虚拟产品....他们没有拒绝任何有关我们的自定义支付门户的信息。
他们可能会在他们愿意的任何时候撤回所有执行此操作的应用程序，尽管我不认为这是一种可能的情况。
We've developed several applications that transport users to a web page payment portal contained within the application.
Apple have seemed fine with this approach, in one particular application we had implemented both In-App purchasing and a custom payment portal - they asked us to remove In-App purchasing as the app was selling deal/vouchers and they classed this as virtual product.... they didn't reject anything about our custom payment portal.
Potentially they could pull all apps that do this at any point they feel like it, although I don't see this as a likely scenario.
由于 Android Market 和 Apple 的 App Store 服务条款都禁止您提出要求，因此答案很简单：不，没有办法避免交易费用（并且仍然在服务条款范围内）。
您还询问了免责声明政策 - 如果您的意思是针对您的产品，您应该向您的用户声明您的应用程序可能会随时从其各自的市场中删除，恕不另行通知（如果您决定实施颠覆性的计费）市场）。
Since both Android Market and Apple's App Store terms of service prohibit what you're asking for, the answer is a simple: no, there is no way to avoid the transaction fees (and still remain within the terms of service).
You're also asking about a disclaimer policy -- if you mean for your product, you should disclaim to your users that your app could get removed from its respective market at any time, without any notice (if you decide to implement billing that subverts the market).