iOS 应用内购买：在切换时处理计划按比例分配
我如何处理应用内 SaaS 计划升级（从付费计划 A -> 付费计划 B。）如何处理按比例计费和订阅切换？
付费计划 A 的价格为 9.99 美元/月，付费计划 B 的价格为 19.99 美元/月。
用户拥有一个免费帐户，然后通过应用内订阅升级到计划 A。用户非常喜欢计划 A，以至于他们想在两天后升级到计划 B。您如何通过应用内购买来处理这个问题？
How can I handle In-App SaaS plan upgrade (from paid plan A -> paid plan B.) How do you handle pro-rating and switching of subscription?
There is a paid plan A for $9.99/month and a paid plan B for $19.99/month.
The user has a free account and then upgrades via an In-App subscription to Plan A. The user loves Plan A so much that they want to upgrade to Plan B two days later. How do you handle this with In-App purchases?
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你不知道。
Apple 提供的应用内购买系统不提供按比例购买的方法。无法退款，供应商（您）也无法取消。
另请注意，如果您将计划 A 和计划 B 作为单独的订阅实施...在注册计划 A 之后注册计划 B 的用户很可能会同时注册这两个计划。他们需要取消 A 计划的订阅。
一般来说，应用内购买系统不太适合您所描述的分层产品。
You don't.
The Apple-supplied in-app purchasing system does not provide a way to pro-rate a purchase. There is no way to do a refund, and there is no way for a vendor (you) to do a cancellation.
Also be careful, if you implement plan A and plan B as separate subscriptions... a user who signs up for plan B after signing up for plan A will very likely be signed up for both. They will need to cancel their subscription to plan A.
In general, the in-app purchasing system is not well suited for tiered offerings such as you describe.
苹果新订阅系统 https://developer.apple.com/app-store/subscriptions/< /a> 现在提供降级/升级/交叉升级功能。
Apple new subscription system https://developer.apple.com/app-store/subscriptions/ now provides downgrade/upgrade/crossgrade capabilities.