# appflow与appstore first paid和subscription retention差异
#### 数据差异的原因：
当appflow与appstore的first paid和subscription retention有较大数据差异时，可能是以下两个原因导致的：
1. appflow源数据丢失（通过对比appflow与appstore的事件数据差异，如果差异百分比符合预期的话，就可以排除此原因）
2. appflow与appstore对于first paid的定义不同（但appstore没有文档描述first paid的定义，所以没有办法将appflow的first paid数据修改到与appstore first paid相同）
**如何对比appflow与appstore的事件数据差异？**
1. 在appflow配置appstore，参考[配置文档](/docs/integrations/app-store-connect-api.md)
2. 项目选择PT时区（appstore sales报表使用PT时区统计数据）
3. 在appflow建立report，report添加以下四个metric。进行事件对比：
1. Trial和 Appstoere Activations
2. Conversion to standard price 和 Appstoere Conversion to standard price
**此外，在AI Report的Monthly报表有新增appstore和appflow的事件对比数据的内容：**
ps: 需要先在appflow配置appstore connect api的使用，参考[配置文档](/docs/integrations/app-store-connect-api.md)
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