MOBILE APPS Mobile application usage has boomed in the last few years, thanks mostly to the rise in the number of people who own smartphones. Smartphones outsell personal computers by approximately four to one, with approximately 2.5 billion mobile phone internet users. It has been predicted that by 2020, 80% of adults will own a smartphone. Impressive statistics, but does it mean anything? Actually yes, with smartphone ownership on the rise, app usage has also risen at a similar pace.