Adobe Scan is a free PDF scanner app turns your iPhone iPad into a powerful portable PDF scanner that support OCR and recognize text automatically. It is one of the best free scan apps we have found so far. With the scanner app, you can make anything scannable, receipts, notes, documents, pictures, business cards, whiteboards. The built-in free optical character recognition (OCR) lets you create editable PDFs that you can work with in any PDF reader, editor. Automatic PDF scan is supported. You can preview, reorder, crop, rotate and adjust color. It allows you to search, select, copy text, etc.