The recent growth in smartphones has changed people’s lifestyles. A 2013 survey,
conducted by Google and Ipsos MediaCT, in which 1000 people (18-64 years old)
were interviewed, demonstrated that smartphone penetration exhibited a substantial
growth from 19% to 51%. In addition, the survey indicated that these smartphone
users were heavy users of social networks: 93% of users used SNS daily, from which
61% used SNSs at least once a day and 60% viewed the sites by using smartphones
[12]. Therefore, smartphones have become a central part of daily lives.