CamScanner is a mobile based app and it is available in google play store. Basically it is a packet scanner and with the help of this one you can any soft copy documents and photos etc. It also provides options of increasing contrast, brightness and sharpness. There are so many scanner apps are available in play store but this one is far better than others.
Additionally, you can adjust your document and even remove not necessary part as well. With the help of this app, one can save scanned document in a folder. As far as usefulness is concern, it is really useful for everybody. After installing this app, there is no need to go internet cyber cafe for scanning job.