Polaris is an application that can be installed on smartphone in form of a viewer that can open various documents or in form of a standard office package that can created different document types like DOC, PPT, XLS, etc.
It's all up to you to choose where to store those files since the program will ask you where to save files. If you don't know where the files are saved, start the program, then create a new document and use Save, then the default saving path will be displayed on screen.
You can then use the built-in file manager to transfer the files to another location or email them to your email.