There are some tasks that will never be suitable for a smartphone—serious video editing and serious spreadsheeting, for example—but there’s plenty that you can do on these pocket devices, and that ...

To properly sign a PDF on your Android phone or tablet, you'll need to download an app from the Google Play Store.

Before you download, open, or share files from the internet, you need to be sure they’re safe. And how do you do that? I simply use a file scanner to check for known threats like malware, viruses, and ...