Although there are many scanner apps offered by other parties such as adobe and dropbox – I have been using an app called iScanner. With iScanner you can scan books, receipts, any kinds of documents, paper notes, whiteboards, schedules, timetables – anything you might need in your day-to-day life. I feel that it is not only convenient – but it is free in the App Store for both iPhone and android users. It also does not require or take up too much storage on your phone and users also have the option to important export files etc. and are able to use all the features of almost all scanner apps if not more! I use this app not only out of convenience but to save time, money and patience! I rate this app a solid 4.5/5 and am still using it til this day – although I have indeed tried using other scanner apps – but found that they either force you to update and pay for the apps full features etc or the app takes up too much space on my iPhone.