There are other apps that do similar things. When I was in college a decade ago I was using "CamScanner", which seems to still be around (though I feel like I r

There are other apps that do similar things. When I was in college a decade ago I was using "CamScanner", which seems to still be around (though I feel like I read recently that it got bought and the new owners started doing something sketchy) These days I just use the regular camera app. Documents are plenty readable as-is, and you can straighten/adjust 3D perspective/raise contrast using the regular photo editing features (at least in iOS)