Guide to Travel app development in UAE 2020 - FuGenX The point is clear that most of the applications uploaded to the app marketplaces (Google play store or Apple store) are supposed to be free. However, as time moves on, its owners are applying different app revenue models to make a profit. Below you can find different app revenue models that you can apply for the proposed new travel app/city guide app. https://www.fugenx.ae/complete-guide-to-travel-app-development-in-uae-2020/