McDonald's brings back its "Free Fries on Fry Day" deal

McDonald's is throwing in some extra fries if you make a purchase on Fridays.
Tomorrow and every Friday through June, the fast food chain is bringing back its "Free Fries on Fry Day" deal.
To get the deal, you have to make at least a $1 purchase through the McDonald's App.
The deal involves one medium-size fries per customer.