Android libraries, the momentum of Android research has not yet produced a complete set of common libraries to further support in-depth analysis of Android apps. We, therefore, leverage a dataset of about 1.5 million apps from Google Play to harvest potential common/ad libraries. With several steps of refinements, we finally collect a set of 1,113 libraries supporting common functionality and a set of 240 libraries for advertisement.

-   **App Lineages:** App lineages, which represent the evolution history of a given app (cf. Listing \[code:app\_lineage\] illustrates an app lineage example), is valuable for various research directions. For example, they can be leveraged in practice to infer API usage updates that app developers adopt with respect to API changes in the framework. They can also be used to infer bug fix patterns and vulnerability repair schemes. Our main objective in this work is to present to the community a large set of app lineages that can later be leveraged by researchers and practitioners to support or facilitate their analyses.

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Implications {#sec:implications}
============

Fig. \[fig:overview\] presents an overview of possible implications that 