In android, a customer can cancel a purchase so long as they do it before 30? mins have elapsed. It's been my experience that a fair number of app sales end up being canceled by customers. I believe this is because the customers are trying the app and finding that it's not something they actually want to pay for.
As far as cancelation reason, I think there's no good way for that data to flow back to developers yet (I've never seen a real reason given on cancelations that have happened in my apps).
Does this happen often? In the case of my app, yes.
There is no built-in way to figure out why someone cancelled the order (for example, the uninstallation survey is not available to developers).
Contacting the buyers will work, but honestly I would advise against it. Even though as a developer, it would be useful, as a user I personally would be rather annoyed if I was contacted by the developer every time I tried out an application and didn't choose to keep it. One of the best parts of the Market is the no-strings-attached trials. You should look at the trial period and refunds, not as people who purchased your application and then changed their mind, but as people who weren't going to purchase it, but decided to give it a shot because there were no consequences. I know that I have purchased applications that I wouldn't have otherwise because I was able to try them out.
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在android中，顾客只要在30之前取消购买就可以取消购买吗？分钟已过去。根据我的经验，相当多的应用程序销售最终被客户取消。我相信这是因为客户正在尝试该应用程序并发现这不是他们真正想要付费的东西。
至于取消原因，我认为目前还没有好的方法让这些数据流回开发人员（我从未见过关于我的应用程序中发生的取消的真正原因）。
这种情况经常发生吗？就我的应用程序而言，是的。
In android, a customer can cancel a purchase so long as they do it before 30? mins have elapsed. It's been my experience that a fair number of app sales end up being canceled by customers. I believe this is because the customers are trying the app and finding that it's not something they actually want to pay for.
As far as cancelation reason, I think there's no good way for that data to flow back to developers yet (I've never seen a real reason given on cancelations that have happened in my apps).
Does this happen often? In the case of my app, yes.
没有内置方法可以找出某人取消订单的原因（例如，开发人员无法使用卸载调查）。
联系买家是可行的，但老实说我建议不要这样做。
尽管作为一名开发人员，它会很有用，但作为一名用户，如果每次我尝试一个应用程序并且没有选择保留它时，开发人员都会联系我，我个人会感到非常恼火。市场最好的部分之一是无附加条件的试验。您应该考虑试用期和退款，而不是像那些购买了您的应用程序然后改变主意的人一样，而是像那些原本不打算购买它但决定尝试一下因为没有后果的人一样。我知道我已经购买了原本不会购买的应用程序，因为我能够试用它们。
There is no built-in way to figure out why someone cancelled the order (for example, the uninstallation survey is not available to developers).
Contacting the buyers will work, but honestly I would advise against it.
Even though as a developer, it would be useful, as a user I personally would be rather annoyed if I was contacted by the developer every time I tried out an application and didn't choose to keep it. One of the best parts of the Market is the no-strings-attached trials. You should look at the trial period and refunds, not as people who purchased your application and then changed their mind, but as people who weren't going to purchase it, but decided to give it a shot because there were no consequences. I know that I have purchased applications that I wouldn't have otherwise because I was able to try them out.