iOS: https://itunes.apple.com/pt/app/evernote-scannable/id883338188?l=en&mt=8

Android: https://play.google.com/store/apps/details?id=com.evernote&hl=en

Scanners are expensive, and the quality of a phone’s camera with some processing of the photo is enough so that you don’t need one. Scannable can detect most types of documents and save your page or business card to a file.