A free program for Android, by OnlineConverting.

The application allows you to convert your DOC files to PDF format. The main advantage of this app is that it does not require any special permissions, so it is not only compatible with Android, but also with iOS and Mac OS X. The application is very easy to use, and you will not need any special knowledge to use it. The main thing you need to do is to select the DOC file that you want to convert to PDF, and then you will be able to choose the output directory where you want to save the document. You will be able to see the progress of the conversion in the notifications.