A free program for Android, by TVApp.
This app can open and view Microsoft Word, Microsoft Excel, PPT, PDF, and many other office files on your mobile phone. You can read all kinds of documents without opening the computer or the internet.
This app is very easy to use, and you can read all kinds of documents at once. Just tap on the file you want to open, and then tap the Open button. If you want to view or edit your document, tap on the file and then the Edit button.
If you want to add a new document, tap on the New button, and then tap on the document file.