I know this is an old question but I figured that I would add more details about using the app to pre-order as you may run into some limitations. For example you can only order up to a dozen doughnuts. Another example would be that you can only order up to six muffins or bagels. Etc... Using the app to pre-order is still a great feature and time saver, just make sure you plan things out ahead of time to avoid running in to the current limitations.
How much are a dozen donuts?
Yes using the Dunkin Donuts app. It's very easy and has discounts available frequently.
Thanks! Your answer is awaiting moderation.