Dunkin' free coffee arrives on Wednesday, Oct. 21, when Dunkin' Donuts gives away 1 million coffees through its app. The offer goes to the first 1 million customers who enter a promo code in the Offers & Rewards section and can be used for a hot or iced coffee.
Customers can redeem the offer after claiming it through Monday, Oct. 26. The app is available on the App Store and Google Play, making the promotion a quick tap-and-claim exercise for anyone who wants to get in before the first 1 million redemptions are gone.
Dunkin' Donuts lists SIZEDOESNTMATTER as the promo code for the offer. The giveaway lands alongside a limited-time Halloween menu with 12 new festive drinks, including five new zero-sugar energy drinks, three new refreshers, three new coffee options and Franki Matcha.
SIZEDOESNTMATTER in the Offers
The claim process is simple: open the Dunkin' Donuts app, go to Offers & Rewards, and enter SIZEDOESNTMATTER. The free coffee can be hot or iced, so the value is in the redemption window, not in choosing a single drink type.
The catch is the limit. Only the first 1 million customers who enter the code can use it, which means app users who wait may miss the offer even though the redemption period runs through Monday, Oct. 26. That makes speed the deciding factor, not just having the app installed.
Dunkin' Free Coffee: 1 Million Cups Arrive September 24 shows how these app-only offers are built to move quickly, and this one follows the same pattern: claim first, redeem later. For anyone planning to use it, the practical step is to enter the code as soon as the offer appears in the app, then save the redemption for any day through Monday.
