N Docs allow you to view documents on Android. No internet connection is required.
* Supported file formats
- Microsoft Word(DOC, DOCX, support password protected DOCX file) - Microsoft Excel(XLS, XLSX, supports password protected files) - Microsoft PowerPoint(PPT, PPTX, supports password protected files)
- Open/Libre Writer(ODT, Open with third-party app) - Open/Libre Calc(ODS, Open with third-party app) - Open/Libre Impress(ODP, Open with third-party app)
- Hancom Hanword(Open with third-party app) - Hancom Hancell(Open with third-party app) - Hancom Hanshow(Open with third-party app)