Data Cops Guard Against Excessive Charges by KIT EATON


By KIT EATON

Applications can save the user money by monitoring mobile and Wi-Fi use, and even make comparisons with other users.

Published: December 19, 2013 at 12:00AM

from NYT Technology http://www.nytimes.com/2013/12/19/technology/personaltech/data-cops-guard-against-excessive-charges.html
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