The tip of the day for free food is the app Scoutmob: http://scoutmob.com/mobile
Scoutmob is an app that lets you find local deals. It has a lot of free deals depending on your local area! It is completely free and only requires you to show your coupon in the app at the register.
Remember to follow and upvote. I will post daily tips on deal that can get you free food.