Scanner Pro is described as 'Scanner is a great app for quickly scanning and saving a digital version of a paper document like receipts, whiteboards, paper notes, or any multipage document'. There are more than 10 alternatives to Scanner Pro for a variety of platforms, including Android, iPhone, Android Tablet, iPad and Windows Phone. The best alternative is Open Note Scanner, which is both free and Open Source. Other great apps like Scanner Pro are Microsoft Lens (Free), OpenScan (Free, Open Source), Pocket Scanner (Paid) and Scanbot (Freemium).
Clean Scan is a mobile document scanner, easily digitize your paper documents into pdfs. With tons of features, document scanning has never been easier. The best part is, it’s open source with an apache license. • Free