Android 7.0 Nougat developer preview will now show an application's install source in the app info interface. The new list item comes at the bottom, under the subheader "Store." This field is populated by a string obtained through getInstallerPackageName method, previously only accessible via a manual query. This string can be filled by a third party app store (such as Amazon, whose Appstore currently does this), or left blank in the case of an application that has been sideloaded.

As you can see in the hero image above, the Pokemon GO APK I sideloaded shows as having been installed by the package installer.

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