There are tons of PDF scanning apps on the market, but not all of them offer the best user experience. That’s why we decided to find the best free PDF scanner app for Android. We tested several apps, and the best one came from the Doc Scanner app family. The Doc Scanner app is completely free to use, and it offers a variety of features that will help you digitize your paper documents. Sometimes, you’ll need a document but don’t have access to a printer. Or, perhaps you’ve misplaced your copy of the document and need to access the file online. Whatever the reason, sometimes you need a digital copy of a paper document. The best free PDF scanner apps for Android allow you to take a picture of a document and then save it as a PDF file so that you can access it later.