Are you set on paying for your lunch today? Then we’ve got just the free burger for you.

Shake Shack is now open on South Lamar Boulevard. Contributed by Knox Photographics

Shake Shack has a new promotion that makes getting a free burger almost as easy as eating it. The restaurant is celebrating the launch of its new mobile-ordering app by gifting everyone who downloads it a free burger. You can get yours by downloading the app, creating an account and using promo code “shackappy” at checkout.

Get App-y! Download the #ShackApp & create an account before 2/28 to use the code "shackappy" for a burger on us:

— SHAKE SHACK (@shakeshack) January 23, 2017

The app is intended to make getting Shake Shack when you want it that much easier. Users can order ahead of time and specify the time they’ll be ready to pick up. The app is not currently available for Android phones. So if that’s your situation, borrow a friend’s iPhone and get what’s yours.

READ: Austin’s best fried chicken sandwiches

Don’t forget that fries (even the not-free kind) go great with hamburgers.