Free software on your phone or tablet lets you scan, create, edit, annotate and even sign digitized documents on the go.

Gone are the days when you needed a bulky scanner to digitize important documents: Your iPhone is a high-quality scanner that you always have in your pocket. Whether you need documentation for ...

You can digitally sign a PDF in several different ways, including Adobe Acrobat, Apple's Preview app, and mobile apps, among other options.