To add a bit to what Anth said, I have used both the free and paid versions of MFP, and to me the only real difference was the barcode scanning. Which was pretty helpful, especially when I first started using it.
But after a while, at least for me, I kind of got into a routine of eating a lot of the same things over and over and it’s already in my saved history anyway. So, I just stopped paying for it, and if I needed to add a new item and it wasn’t already in the database, I would literally just go through and “create the food” myself.
Can be a little bit of a pain and time-consuming on the rare occasions it happens, but again, I generally eat a lot of the same things in various combinations when I’m really “on track,” so that doesn’t happen very often.