[{'role': 'user', 'content': 'Analyze the following clause from a privacy policy and determine if it\'s fair or unfair. Also identify any privacy practices mentioned: Mobile device IDs. If you\'re using our app, we use mobile device IDs (the unique identifier assigned to a device by the manufacturer), or Advertising IDs (for iOS 6 and later), instead of cookies, to recognize you. We do this to store your preferences and track your use of our app. Unlike cookies, device IDs cannot be deleted, but Advertising IDs can be reset in "Settings" on your iPhone. Ad companies also use device IDs or Advertising IDs to track your use of the app, track the number of ads displayed, measure ad performance and display ads that are more relevant to you. Analytics companies use device IDs to track information about app usage.'}, {'role': 'assistant', 'content': 'This clause is unfair. The privacy practices mentioned are: Identifier_Ad_ID_1stParty, Identifier_Ad_ID_3rdParty, Identifier_Device_ID_1stParty, Identifier_Device_ID_3rdParty.'}]