9.4. Monetizing Apps with In-App Advertising

Many developers offer free apps monetized with in-app advertising—often banner ads similar to those you find on websites. Mobile advertising networks such as AdMob (http://www.admob.com/) and Google AdSense for Mobile (http://www.google.com/mobileads/publisher_home.html) aggregate advertisers for you and serve relevant ads to your app (see Section 9.13). You earn advertising revenue based on the number of click-throughs. The top 100 free apps might earn a few hundred dollars to a few thousand dollars per day. In-app advertising does not generate significant revenue for most apps, so if your goal is to recoup development costs and generate profits, you should consider charging a fee for your app.

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