McDonald's fries are probably the best fast food fries you can get. If they're fresh, anyway. And now McDonald's is about to make our lives a little saltier with free fries every Friday for the rest of the year.

However, there is a catch. Isn't there always?

To get your free medium fries, you'll need to download the McDonald's app and sign up for their deals. The free fries coupon in the app is good for weekly visits from now until December 30, 2018. You'll have to spend at least $1 to get yours, so if you're a cheapskate like me, you can pair them with a basic burger or some nuggets.

McDonald's website has more details. It's also making me hungry, so I'm going to stop here.