A free app for Android, by OnlineConverting.

XLS to PDF Converter is a quick and easy app that lets you convert an Excel Spreadsheet into a PDF Document. This is possible in just a few minutes. The app has a simple interface that lets you do all the conversion in one click.

After selecting your desired file format, the app will then convert the selected file. It is important to note that this process will take some time and the conversion will not be instant.

You can also choose to add multiple documents at once for faster processing. The app will also notify you when the conversion is complete.

The app has no built-in PDF viewer. If you want to view your PDF documents, you can use any PDF viewer on your device.