A free program for Android, by Tri Tech Apps.
The app to read all kinds of XLS files on your phone, without any problem. This is the most complete app, which can read all kinds of documents. You can open any document from your phone or from your computer. All the documents have a list of all the files in them, and you can open them on the spot. All of them have a preview of what is inside them, and you can zoom in and out to see the details of the document. You can also delete your documents, or make a backup.
This app is not only a reader, but also a file manager. So, if you have a lot of files in your phone, you can easily manage them. You can delete them, make a backup, share them, or open them in a new document. All of them are in a list, so you can easily view them in one place.
This app has a search bar to search your files quickly. The search bar lets you search by name or by content. This app is also an Opener for XLS files.