There has been a significant rise in the number of businesses that are offering mobile apps across all major platforms. There are almost 1.6 billion mobile users globally and 52% of the time spent on digital media is on the mobile apps. Among the smartphone users, 89% of the mobile time is spent on the app. Mobile app is no longer an option but a necessity for businesses that want to target the users and rev up their sales and revenue. Here are 3 time-tested ways to earn more money with your mobile apps.