You can use Microsoft Word for iPhone and iPad for viewing, creating and editing documents, without a Office 365 subscription.
Word for iPhone and iPad can view your documents (doc, docx) exactly as it does on the desktop version of Word. You can save your Office documents in the online storage services such as OneDrive or Dropbox. Besides Word, Excel and PowerPoint are also available for iPhone and iPad. An Office 365 subscription is required for advanced features, but most home users will work very well with the free version.