The number of mobile phone users in the world is expected to pass the five billion mark in 2019. The number of smartphone users is forecast to grow from 2.1 billion in 2016 to around 2.5 billion in 2019, with smartphone penetration rates increasing as well. Just over 36 percent of the world’s population has been projected to use a smartphone by 2018, up from about 10 percent in 2011. China, the most populous country in the world, leads the smartphone industry. The number of smartphone users in China is forecast to grow from around 563 million in 2016 to almost 675 million in 2019. Around half of the Chinese population is projected to use a smartphone by 2020. The United States is also one of the largest smartphone markets in the world with one of the highest smartphone penetration rates worldwide. In 2017, 68.4 percent of the U.S. population used a smartphone. This is a significant increase from the 2012 figure when the country’s penetration rate stood at almost 40 percent. The number of U.S. smartphone users is estimated to grow to more than 230 million in 2018 from a figure of 223 in 2017. By 2019, the number of smartphone users in the U.S. is expected to increase to 247.5 million, which roughly corresponds to ten percent of the estimated number of all smartphone users worldwide for that year


The mobile application market is rapidly gaining popularity primarily due to a huge number of mobile devices and the continuous growth of new devices. This is also driven by the global increase in the variety of phones at different price points, ranging from very affordable phones to premium phones. Mobile apps are usually an economically viable solution, not only for entertainment purpose but also for business and other productivity use.


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