iPhone developers know from last year that they can expect a big Boxing Day boost, as hundreds of thousands of people start browsing for content on their newly-gifted iPhone or iPod touch.
However, they can mark another big day in their calendars: Black Friday. It's traditional for US retailers to offer big discounts on products on Thanksgiving Friday, and last week was no exception.
Now analytics firm Mobclix is saying that the App Store also benefitted, with a 59% traffic boost on the day - and a 43% increase for Thanksgiving week as a whole, compared to the three other weeks in November.
Whether this is due to the way thousands of apps had their prices chopped for the day, or simply because people were sitting about at home with time on their hands, is unclear.
Even so, the sheer number of the former, allied to the upswing in traffic, means Black Friday is set to mean cheap apps in future years as well as cheap products.