Word To Text is a really simple app that lets you convert DOC files into plain text format. The interface is really simple, and lets you explore all the folders on your Android so you can find the file you need to convert. That done, you just have to tap it and you’ll see the text (in a clear and big font) on the screen. With the document visible, just press the disc icon to save it in TXT format.
Word To Text is a light app (just 1.5 megabytes) that lets you open DOC files on your Android, and then save them as TXT files.