Google Stack is a document management app created by Area 120. The app currently works on Android phones and tablets in the US.

Google Stack was a document-digitizing and -filing app for U.S. Android customers. It used artificial intelligence to scan, organize, and save files as PDFs. It was discontinued in late September ...

There have been some reports of Chrome OS essentially becoming Android, going beyond Google's stated goal of using parts of the Android tech stack on Chromebooks.