This detailed guide covers how to sign documents on iPhone and iPad without needing a third-party app or service.

Sign with Google Drive on Android or iPhone The Google Drive app -- included on all Android phones and can be downloaded onto an iPhone -- includes markup tools that make it easy to sign a document.

The iPhone is the only tool you need to scan and sign documents quickly - here’s how the entire process works.

Signing PDF's on the iPhone is a simple process and one that many users could take advantage of. Find out how to sign a PDF document with your iPhone here.

How to sign a document on an iPhone Adding signatures to a digital document is a completely different ball game than just picking up a pen and signing a physical form.

How to Sign a PDF Document on Android Unlike an iPhone or iPad, the default file manager that comes pre-installed with most Android skins doesn’t offer a built-in PDF signing feature.

If Apple's native document scanning and management features aren't enough, Scanner for iPhone can help by bringing all the necessary tools and features into a single, simple interface.