I've had this app since the iPhone 5s was released around 2013; since then every phone I've owned has had it installed. The fact that I've never had a need for or desire to explore another scanning app is the greatest aspect about it. I primarily use the *free version for PDF scans [from 1page thru 17 pages before]. The MAGIC feature which automatically scans for... detects, crops, then enahances is great. Provided you heed the tips the app provides to achieve best results.
For the average college student, employee, grad student, etc... That only needs to scan something occasionally, wants it to be easy/quick/shareable and reliable... I'd definitely recommend this scanning app.
*Since I've never needed to utilize the functions of the paid version, I can't attest to those aspects of the app. But if your at the point of paying for a scanning app. You probably aren't reading this! ???*