Until you have to get to work. Or simply need a quick scan of a doc for serious, legitimate reasons.
That's when CamScanner steps in. Why not simply take a photo? Well, CamScanner has a few additional tricks up its sleeve. It will modify the image so the document appears centered and flat, with legible texts.
For a monthly fees, you even have access to a decent OCR software, that is, get your picture into a .txt document with easily modified text.
One recommendation though: photograph your document against a contrasting background to help CamScanner do its job!
While nothing revolutionary, this is a very useful app for iTunes and Android. you can even learn more on their website: https://www.camscanner.com/