PDF organiser Stack is the most recent app to visit the Google graveyard

Stack, one of Google's experimental Android apps, will disappear on September 24. A product of Google's Area 120 incubator, Stack was one of those overlooked gems that was just plain useful: It let you create or import PDF files and save them in a variety of categories it called stacks: treasure, insurance, medical, etc. The application extracts data from the PDF file to suggest a title, add searchable information such as the document's date, amount (if it is a receipt), or publisher organizations and fields to add comments.

According to Google's support page, Stack's "features are integrated into the Google Drive app." As someone who uses Stack to store and then easily find a lot of PDFs that I need quick access to, I might argue against that, but hey, Google isn't exactly known for its abandoned app graveyard. If you've been using Stack to create and track PDF files, you'll want to move some or all of your documents. Google recommends moving them to Google Drive and has included the Stack feature to make it a simple two-step process:

On the main page of the Stack app, tap your person icon > Settings. Select Export all documents to disk.

When you go to Disk, you'll find a folder called Stack Export; all your PDF files will be in this folder. Unfortunately, if you're a Stack user and you've carefully categorized and tagged your PDFs, you'll find that it's a waste of effort - the folder just contains all the PDFs without any categorization or additional text.

Some additional notes:

To export a single stacked PDF, go to that PDF and use the export icon in the top right corner to move it to where you want it. If you've backed up the contents of the stack to your Google Drive from the start (Settings > Save PDF Copy to Drive), there's a good chance you won't need to export the content because it'll already be in Drive.

If you don't want to store your documents in Drive, the easiest way is to send them all to Drive and move them from there. However, you can also export them from Stack wherever you want; it's just a more cumbersome method:

• At the bottom of the Stack app, select All Documents.
• Long press the first document you want to export. See the checkbox in the upper left corner;
• PDF is ordered before the date; If you want to transfer all PDF files to a location other than Drive, you can select all dates from the list and use the export icon in the upper right corner.
• Once you've removed the PDF from the stack, you can delete all the carefully organized documents by going to the app's Settings > Delete page.