iOS 7 has taken top billing in Pfeiffer Consulting’s annual Mobile OS User Experience Benchmarks, scoring just over 73 percent against 57 percent for Android and 47 percent for Windows Phone.

The study attempts to calculate an objective rating for the usability of a mobile OS by a typical, non-technical user by measuring four elements:

  • Cognitive load
  • Efficiency
  • Customization
  • User experience friction … 

The methodology is not without its controversy (see the discussion in the comments on Pfeiffer’s site), in that the criteria used represent Pfeiffer’s own rating of key usability elements rather than the results of user testing, and the Android version tested includes’s Samsung’s own Touchwiz interface – chosen because Samsung is the market leader in Android.

Individual category scores are shown below.

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