Document Scanner is the best PDF scanner app for Android phones. It is a portable app and works as an all-in-one scanner, allowing you to scan, edit, convert, and save your documents in PDF format. It also has text recognition so you can convert images to PDFs.

It is a useful app for any office work, for instance, it is a perfect choice for those who need to take notes, make business cards, create invoices, receipts, or any other kind of document for which you need a scanner. You can use it to scan your ID, passport, driving license, or any other document.