Photomyne is great for scanning of paper photos
If you haven't already discovered Photomyne I think you should try it. I think the result is better than with Google Scan.
I don't use my scanner in my printer anymore as it does not work properly with Win10. But I don't care - scanning with the phone is easier and the resulting photos are good enough for my purpose
Here's a photo of my son 25 years ago. Taken with an ordinary cheap compact camera. The scanned version looks better than the album photo - I really don't understand but it's great.
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Looks like it did a great job! I just finished sorting 38 years worth of photos with the intentions of scanning the best and putting them in a Flickr account or something so the whole family can access it. I will look into this app. Thank you!