Paid application: this is easy to understand, that is, paying for profit through software. Some developers also add additional subscription products to the software, such as in-game purchase.

Free application: mainly rely on advertising and in-house purchase. Developers access third-party advertisements, and users use advertisements to watch advertisements in the process of using software, so developers will have income. The same is true for buying paid goods in software.

Extended data:

Google will rename Android Market, an online store selling applications, videos, music, e-books and other digital products, to Google Play Store, which will take effect on Tuesday. This is the latest move launched by Google to enhance its image in the electronic content sales market and better compete with Apple and Amazon (Weibo).

Yerga said that because Google sells all kinds of digital content through different channels-consumers can buy e-books on Google Book website or Android Market website-it will confuse consumers.

In addition, the applications that consumers use to play music and videos or buy and read books also have different names, which brings more confusion. Starting from Tuesday, the Play brand logo will appear in the names of Google's various media applications.