Scanner Lens App- Scan, Sign Documents Electronically and Extract Text from PDFs and Images

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Scanner Lens Pro is a good scanning app that is on sale today. It is free and only for a limited period of time. Besides HD quality scan, Scanner Pro offers text-recognition functionilites (i.e., OCR) allowing you to easily extract texts from images and PDFs. It also enables you to save as many electronic signatures as you want. You can even add notes and PDFs and images. Your scanned materials can be printed, shared through email, or through any third-party application. 

Other interesting features offered by Scanner Pro include: "Automatic shutter and edge detection; bitonal image processing: Blob removal, distortion correction; add filters: Gray+, Gray, contrast, B&W,Magic; editing: Crop, stretch, rotate, mark up as you like; convert docs into PDF or PNG; share and upload PDF files to cloud services; export scans to FAX app and send them worldwide."

Courtesy of Apps Gone Free