Docr - Docr is a free app for the iPhone smartphones that lets its users scan all of their documents into sharp images and, in the end, store them as PDF files.
GImageReader - gImageReader is a simple Gtk/Qt front-end to the Tesseract OCR Engine.
Scanner Pro - Scanner Pro turns your iPhone into portable scanner in your pocket.
Adobe Scan - Scan anything into a PDF using your mobile device.
Genius Scan - On The Go.
Microsoft Lens - Microsoft Lens (formerly known as Office Lens) is an all-in-one application designed for Windows, Android, and Apple devices, allowing you to capture important information from signs, PDFs, whiteboards, and more to add.