This app was mentioned in 1 comment, with an average of 1.00 upvote
A redditor created this app "Dietradar" that scans labels and highlights suspicous ingredients. I use it regularly and it is pretty good. Not sure if there is an IOS version.
https://play.google.com/store/apps/details?id=com.haydenjh.dietscan.app&hl=en