Advertisement of application

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Jun 28, 2012 14:58
In Appstore, many free applications were launched. They looks free at first, but using the application, the most shows the advertisement under screen without exception. Are they noisy? I don't think so. To make an application, developer should spend many time. From at least 3hours to 3months, it's different each other. We, as a free user, have to pay to the effort, but just a few users are willing to pay. So to get even some pocket money for developer, they put the advertisement.