CamScanner HD has been downloaded and set up by over 1M users and its latest update was released on Apr 1, 2014. The tool displays ads. A number of users set up this application on their Samsung and Asus devices.
It's free of charge to download the installer of CamScanner HD, also, you can read users' reviews on Droid Informer. The app works fine on Android 3.0 and above.
As users mention, the app has some important pluses, they are a simple user interface and useful features. Users write reviews pointing out that you can find such a drawback of this application as intrusive ads.