Good idea.. I would use it.
It should have multiple profiles so you can setup separate lists based on different trips.
Inventory for a summer outing to LotW with a scheduled shore lunch will be much difft than a winter trip to CIL.
The app should also have a ToDo list.
It should be cloud enabled so you don't loose your data if you switch phones.
You can setup a checklist of Questions that allow the angler to provide a summary of each trip, highlighting weather/wind, water temp/clarity, patterns, fishing success, photo uploads.
You can make the app social media-aware - we all like detailed fishing reports on the forums. Wouldn't it be nice if they can be posted in a common format?