According to the different installation sources of mobile App, it can be divided into mobile phone pre-installed software and third-party application software installed by users themselves. Mobile phone pre-installed software generally refers to the software that comes from the factory or is pre-installed in the consumer's mobile phone through the third-party brushing channel.

And consumers can't delete applications or software by themselves. In addition to mobile phone pre-installed software, there are also third-party mobile App applications downloaded and installed by users from the mobile phone application market, and the download types are mainly concentrated in social community software.