There are two main ways developers can monetize their mobile app:
1) Require the public to purchase the app for an upfront cost.
2) The Freemium Approach. Where you provide a free app, which provides so much value, that people feel motivated to want more (and then make in-app purchases)
CEO of 14 Oranges, Sylvain Marcotte, sat down with Evolution Radio to discuss the evolution of this trend and the common ways developers are monetizing their mobile apps today.