A free app for Android, by BingoTools.

The free Docx Office: All File Viewer is an application for viewing and editing Microsoft Word, Excel, PPT, PDF, text, and other documents on your Android phone or tablet. The program can be used offline and is capable of reading and viewing all types of documents on your device. It supports many different formats and makes it easy to view your documents. You can even print them out or send them by email.

The app has a user-friendly interface that is easy to use and understand. It is compatible with most Android devices and can be used on your Android mobile phone or tablet.