WhatsApp can do more than send messages and photos. A hidden tool inside the app turns stacks of paper into tidy digital files in just a few taps.
It's easy to download a PDF document on an iPhone and save it to an app like Apple Books or iCloud Files. Here's how to do it.
You can save any PDF onto an iPad, and read them in apps like Apple Books and Google Drive. Here's how to save PDFs on an iPad, with specific steps.
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