McDonald's is offering 50% off to customers this week, no minimum spend, with the catch being that they must download the My McDonald's app.
The discount will apply to the whole menu, so customers can get a cheeseburger for under 50p, and can be redeemed in Milton Keynes restaurants and drive-thrus.
It only applies to new users of the app, meaning that those who already have an account cannot take advantage of the half-price food.
Another deal for registered users is on offer, however, giving customers the chance to save £5 for every £15 spent.
The 50% off deal only applies to customers who have downloaded the app before 23:59pm on 1st November.
Find out more, including T&C's, here.