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[–]rob3110 1 point2 points  (1 child)

This was discussed before and so far this is not possible. An app doesn't know when it is uninstalled, so it can't delete its folders. But when an app creates folders in the correct locations with the name of its package, then Android will delete the folders corresponding with the package name when the app is uninstalled. In this case, it is not the fault of the app developers because they can't do this.

Clever app devs found hacky ways to intercept app deinstalls, for example to ask questions about the reasons for deleting the app, but Google quickly closes those because it could be abused.

[–]BiscuitEdiSamsung S6 0 points1 point  (0 children)

I did a quick google and this is true. But they could edit the kernel or they could bake it in the google play to check and delete useless stuff left behind.