Google Docs is a version of the official text-editing tool from Google that's been perfectly adapted to Android devices. With it, you can create and edit text documents as well as share them over the Internet and work on them simultaneously with other users.
The application lets you work on your text documents with and without an Internet connection. If you're working offline, you can save your changes to the cloud to be uploaded at your next connection time.
As with the computer version, with this official Google Docs app all your changes will be saved automatically, so you'll never lose anything. Even if you run out of battery or close the application, everything will be saved.
Google Docs is an excellent text-editing tool that's especially useful for editing shared documents with other users.