Many college kids are on a budget, and these 15 restaurants give a tempting incentive — free food — to sign up for their email chains or download their apps.

Auntie Anne’s Pretzels: With each purchase, earn points toward a free pretzel, and earn a free pretzel after your first purchase. 

Buffalo Wild Wings: Free dessert when you join the Buffalo Circle.

Americans go out for lunch on average twice a week and spend $10 each time, according to data collected by Visa in 2013. That means they’re spending $936 annually.

Burger King: Special deals when you download the app. 

Chili's: When you join the Email Club, you get an order of chips and queso.

Hotbox Pizza: Free breadsticks with the purchase of a pizza.

IHOP: Sign up for the IHOP Pancake Revolution and receive a free full stack of pancakes.

LongHorn Steakhouse: Free Appetizer for joining the Western Hospitality Club. 

Marco’s Pizza: Free cheesy bread when you join Marco’s Email Club. 

Moe's Southwest Grill: Become a member of Moe's E-World for a cup of queso dip when you join, plus a birthday burrito.

O’ Charley's: Free appetizer when you sign up for the O'Club. 

Panera Bread: Get a bakery item after joining the My Panera club.

Penn Station: Free sandwich when you download their app. 

QdobaSign up for Qdoba Rewards and receive a free order of chips and salsa or a regular drink. 

Red LobsterJoin the Fresh Catch Club and get a coupon for a free appetizer or dessert.

Texas Roadhouse: Free appetizer when you sign up as a Roadie VIP.