A free program for Android, by PhotoAiTech.

Do you want to read and scan pdf files easily using your mobile device? Then you must download this PDF Reader Document Scanner for Android. This app will help you view, annotate, scan, fill, sign, and share PDF files with the free PDF reader. You can also create and sign fillable PDF forms, convert PDF documents to Word/Excel/PowerPoint/TXT, and add your e-signature to shared documents. 

Here are some of the best features of the PDF Reader Document Scanner