The McDonald's Android app for smartphones and tablets lets you:

Order your favorite products and make payments at any McDonald's restaurant nationwide, or at any mobile location.Get exclusive offers only available in the app, like the coupon booklet, which gives you the chance to redeem coupons for your favorite food.View your current location and find all the locations near you.Get directions to a McDonald's restaurant and find all the locations in the area.View the current promotions available at your favorite McDonald's restaurant.

You can also:

See the menu for all the products and choose your favorite ones. Pay with a credit card or debit card.