1.5 billion people in the world own a smartphone. That’s almost 20% of the world’s population; and in the US and Europe, 60% of the population own one. Such a ubiquitous device has become part of our daily lives. Many of us have it on hand at all times to check the weather forecast, get directions, access our text and email messages and read the latest news. Indeed, the average user spends three hours per day on a smartphone and 15% of all global internet traffic originates from smartphones.