I've found that if I don't change my pronunciation but correct the word when it's underlined blue it gets more accurate, I'd assume Apple does a certain amount

I've found that if I don't change my pronunciation but correct the word when it's underlined blue it gets more accurate, I'd assume Apple does a certain amount of training based on it, but I think most people aren't willing to train it too much. I like using it when I'm cooking though, so it gets a lot of "Add a timer for 25 minutes" "Remind me I need more tomatoes tomorrow" and so on.