Tried them all, this one produces best results
Intelligent. Auto select of image size is nice. Recognizes receipts as receipts, full page scans as letter. Easily opens image in Evernote to save. Dropbox support. Very good image enhancements. Hope this dev continues developing this app. One suggestion on ipad would be to put image capture button on the right side to make the capture process just a little easier or a setting to choose where to put it. This app is worth buying pro version just to support dev.
Trailsnorth about
SharpScan: PDF scanner + OCR