Hi friends, I am using CamScanner app from past 2 years. My review is as :
This app is fantastic & reliable for daily purposes especially in scanning the hand written documents. It keeps you away from hastle of scanning from the scanner then getting the .jpeg converted into pdf & sending the email.
Hence you can save upto 10 minutes by using this app. It also gives in-built feature of conversion of documents to .pdf & share option to send the same via WhatsApp, Email, Messenger etc.
You cam enjoy variety of options like Magic color, high contrast, Auto mode, black & white mode etc.
I have never observed any hanging issue in app, moreover this is available for free at playstore or Appstore
Overall, a must keep app.