Need to edit a PDF document but don’t want to pay for the more expensive Adobe editors? You can add text to and sign a PDF with just the free Reader program.

Adobe Reader lets you open a PDF document, sign it securely, and then email, all without opening a printer or scanner or having to waste a piece of paper.

You don't need the full Adobe Acrobat Pro just to sign a PDF. The free Adobe Acrobat Reader can easily handle that job.

The latest version of Adobe Mobile Reader for Android and iOS effectively negates that need for scanning signatures, delivering that functionality through an in-app Ink Signature tool instead.

Upload the PDF you need to fill out, sign into the service, and you’ll find your document opened up and Adobe’s Fill & Sign feature highlighted—no need to download Acrobat Reader first.

Adobe is overhauling its PDF-reading app for iOS with new features that let users sign, annotate, and comment on documents directly from their iPhone or iPad.