Free apps make millions of dollars – here’s how they do it

Instagram, Clash of Clans, Tinder, and Snapchat are all free. In fact, 90-percent of apps are free because people expect them to be free. So how do developers stay in business?   In-app advertising In-app advertising is the most popular and profitable way to monetize an app. Because everyone spends massive amounts of time scrolling, watching, and engaging, in-app advertising is the fastest growing form of mobile advertising. App-install ad revenue is estimated to g