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The "Black show" app was created for people who are unable to control their phone for long periods of time, allowing them to get out of the control of their phone. It will identify the use of mobile phones of the temperature and time, through the screen to flip, therefore, make the person's vision and see the phone's screen, by contrast, in the process, they are difficult to use mobile phone, it will lower their reliance on mobile phone, get rid of the bondage of mobile phones and emotional upset, keep conscious self-awareness to lay down their phones, reasonable use a mobile phone.