Docs To Go Free Office Suite is a decent solution targeted at people looking to edit documents directly on their Android devices. This application brings support for working with PDF files and Microsoft Office formats made with versions between 1997 and 2016. In simple terms, you can view, create and edit all the major document formats used by people for distributing information.
The user interface has a rather simple layout where you can access your files based on their formats (DOC, XLS, PDF, PPT). Besides being able to work with documents stored locally on the storage of your smartphone/tablet, this app also brings integration with cloud services like Google Drive, Box, OneDrive and Dropbox. As you can probably expect, in order to make this feature work you are required to provide the credentials for your account, plus access to the Internet.
Any change made to your docs will be synchronized automatically by this application with the files kept on the cloud server. Regarding the actual features for editing the documents, Docs To Go Free Office Suite provides common commands for changing the font type, size of the text, color and style. The app also comes with a Find and Replace feature which can be used inside opened documents.