Don't mind if we do!

McDonalds French Fries
Credit: JOERG KOCH/Getty Images

From "Get A McDouble For $1", to "$1 Any Size Coffee," McDonald's mobile app is full of mouthwatering, wallet-friendly deals. However, there's one coupon we're particularly excited about: a free medium fry every Friday.

Yes, really! All you have to do is download and register for the McDonald's app and make a purchase of at least $1 to unlock free fry heaven. But don't get greedy, the offer is only valid for a single purchase per week. However, you can make that single purchase every Friday if you so choose.

And the app's deals aren't just limited to fries on Fridays. Delish reports that the coupons vary schedule wise — some are available every day, and others just one specific day of the day. So, it's not a bad idea to check in every few days so you don't miss anything.

WATCH: How to Make Green Bean Fries

But, back to the French fry deal! This bad boy is available on Fridays from now until December 30, 2018, so you have plenty of time to redeem your free order of salty deliciousness.