McDonald's: Buy 1 Big Mac or Filet-O-Fish, Get 1 for $0.25

Buy one Big Mac or Filet-O-Fish sandwich at McDonald's and get one for $0.25 through 3/31! You can actually redeem this offer once a week during March.

To get the offer, download the McDonald’s app and then place a mobile offer or use the digital app coupon in the store.

The coupon is valid once per week through 3/31.