The Android Merge Tool (AMT) does what the name suggests: it merges arbitrary Android apps into a single merged app. As input it takes a number of Android packages (.apk files) and outputs the merged app as one Android package. Along with this primary output, a report is generated optionally. It contains information about the properties (e.g. taint-flows) changed. AMT is available on github (https://github.com/FoelliX/AMT) and the associated paper can be found here.