App economy expected to double by 2020

Billions of people the world over couldn't imagine life without a smartphone. It's been 20 years since the first such gadget hit the markets.  The IBM Simon was the first ever mobile phone to feature software applications. The app economy that sprung up around smartphones is 50 billion dollars and that's expected to double by 2020. There are now about 1.9 billion smartphone users globally, and that number is still rising

steadily.  Worldwide 349 million units were sold in the first quarter of this year alone, marking a 3.9 percent increase over 2015.