Smartphone apps usage: Smartphone apps usage is skyrocketing these days. A smartphone without an app is like a car without fuel. Apps form an integral part of any Smartphone. Smartphone apps usage by the year 2020 would be generating around 189 Billion US dollars in revenue via the app store and app advertising.In 2016, the usage has grown by 11%. Most used apps were the social media. A major portion of time spent by the users was on Social media apps. Social apps constitute a large share of apps usage. On an average, a user has 30 smartphone apps installed.Facebook and Whatsapp hold the large percentage of smartphone apps used. Here is the list of Top 5 Smartphone apps in India. 1. Facebook: Facebook is the top smartphone app in India with 241 'potential audience'