This app was mentioned in 2 comments, with an average of 1.00 upvote
https://apps.apple.com/us/app/fishbrain-fishing-app/id477967747
https://play.google.com/store/apps/details?id=com.fishbrain.app
It's also on the Google Play store!
https://play.google.com/store/apps/details?id=com.fishbrain.app&hl=en