In recent years, a large number of mobile phone APP has been developed and applied, which has played an important role in promoting economic and social development and serving people's livelihood, and has brought a lot of convenience to people. However, there are also many APP problems such as excessive collection of user information. Some APP collects and uses personal information, which is too broad in content and scope, and some information is not necessary for secure, efficient and convenient services. In fact, only those information that must be collected for the development of related services, which cannot meet the needs of users' services without collection, should be collected. The personal information collected by big data in order to accurately distribute advertisements and promote products has nothing to do with the current needs of users and exceeds the necessary limits of collection.
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It is not necessary for mobile APP to collect a large amount of user information.