Fast Document Scanner is described as 'Scanning documents has never been made so easy. With a Fast document scanner, you can easily scan your documents real quick'. There are more than 25 alternatives to Fast Document Scanner for a variety of platforms, including iPhone, Android, iPad, Android Tablet and Windows. The best alternative is GImageReader, which is both free and Open Source. Other great apps like Fast Document Scanner are Open Note Scanner (Free, Open Source), Microsoft Lens (Free), OpenScan (Free, Open Source) and Pocket Scanner (Paid).
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