What are the characteristics of the excellent APP user experience design?

优秀的APP用户体验设计具备哪些特点？

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The user is also given the option to call the police from within the app.

而在用户的应用中也会出现报警的选项。

youdao

The user is also given the option to call the police from within the app.

而在用户的应用中也会出现报警的选项。

youdao