You can get it with adb on non-rooted android: https://gist.github.com/ctrl-freak/24ac0e61b7cf550a6945
Data Hoarder
We are digital librarians. Among us are represented the various reasons to keep data -- legal requirements, competitive requirements, uncertainty of permanence of cloud services, distaste for transmitting your data externally (e.g. government or corporate espionage), cultural and familial archivists, internet collapse preppers, and people who do it themselves so they're sure it's done right. Everyone has their reasons for curating the data they have decided to keep (either forever or For A Damn Long Time (tm) ). Along the way we have sought out like-minded individuals to exchange strategies, war stories, and cautionary tales of failures.
adb explorer adds a pretty intuitive (but slightly janky) interface.
This just works fine.
https://play.google.com/store/apps/details?id=mobi.infolife.appbackup&hl=en&gl=US
Basically any of the old app back programs on phones just packs them back into APKs and stores them
Just search for something like APK backup or app backup on the Google Play store and you will get hundreds of working results usually the hardest part is just finding whatever bullshit folder they decided to shove them in