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The Android market is a place where developers offer paid and-or free apps to users. Free apps can follow the freemium or the ads-business model. While the former offers less features and the user is charged for unlocking additional features, the latter includes ads to allow developers to get a revenue. Free apps are interesting to users because they can try them immediately without incurring a monetary cost. However, free apps often have limited features and-or contain ads when compared to their paid counterparts. Thus, users may eventually need to pay to get additional features and-or remove ads. While paid apps have clear market values, their ads-supported versions are not entirely free because ads have an impact on performance. The hidden costs of ads, and the recent possibility to form family groups in Google Play to share purchased apps, make it difficult for developers and users to balance between …