McDonalds App has some great items every week that can help you save some money while eating there. Almost every Friday, McDonalds has FREE medium fries when you buy any one item while using the app. You dont need to add any money to the app simply install it and after you place your order, scan your app which will show a code/barcode and automatically the amount for the fries should be deducted from your total.
In addition this week there are other great items you can purchase that are on special listed on the app. But keep in mind you can use or scan one deal per transaction.