Think the secret to making money from an app is adding a price tag? Think again -- at least when it comes to Android apps sold in Google Play.
According to App Annie, 96% of the top 100 highest-grossing apps in Google Play are free. In contrast, 77% of iPhone apps and 69% of iPad apps sold in the App Store are free.
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Statista's chart, below, shows the breakdown of the monetization model for top-grossing apps, which generate revenue through in-app purchases, advertising or cost at download.
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