Cam Scanner is the best app. I use the app in a android phone.

Previously I used to take images of documents and store it in my phone drive, however that was not suitable as the picture was not clear and the documents used to be stored in a haphazard way.

However with CamScanner, things are far more easier. You can name your document to your preference and also add documents to that particular named document. So that way you have all the pages of your document stored one after another with the same name, and that helps as we don't have to search for other pages.

Moreover you can cut and crop the document as per your wish. There are options to save it in .PDF or .jpg format. You can share it to other apps, say for example, if you want to share the document to your friend via whatsapp or telegram you can easily do it.

You can always save your documents in google drive.

All documents are easily accessible in the app itself and it is very easy to use.