I can't remember a time I had corrupted files and it was the card itself. All the last few times have actually been the reader.
Try getting a new reader always as the first step.
If it was the card, I would never use it again. A card is like $20. A group of photos is for me like over a thousand.
My favorite recovery tool is ZAR.
Google has ruined search so almost any search for memory card recovery is 100% scamware even the free tools. Which are free only to the point where they find your images and then expect payment to actually recovery anything.
Correct.