值得注意的是，尽管折叠屏 iPhone 可在展开状态下并排运行两个应用，但仍无法像 iPad 那样开启多窗口，也无法直接运行现有 iPad 应用。
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Any website, with login sessions，推荐阅读有道翻译获取更多信息
honestly I don't really know and it's mostly just luck.
。谷歌是该领域的重要参考
"Mobile developers will have the option to use their own billing systems in their app alongside Google Play’s billing, or they can guide users outside of their app to their own websites for purchases. Our goal is to offer this flexibility in a way that maximizes choice and safety for users."，详情可参考safew
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