carbmanager app and web version
https://www.carbmanager.com/
I have been using it since May and it does exactly what you asked for.
Their food database seems enormous, all sorts of brands already in there and you can add your own as necessary.
I have been doing a low carb diet since Mid May. As of this morning I have officially dropped 53 pounds. Woo hoo. From 268 to 215. I originaly had my goal at 225 then hit that easily so decided to lower it to 200. Rode a plateu at 219 for a week or so then dropped 4 in the last day or so.
I think logging the food is the most important step for me. Keeps me on track.
.