Slappstick has updated AppyDays for Mac OS X (10.6 or later) to version 1.5. It costs US$0.99 and is available at the Mac App Store in the Reference category. Version 1.5 includes discounts from MUPromo.
AppyDays for Mac tracks currently discounted apps in the Mac App Store as well as the iOS App Store. With AppDays one click directs you to the Apple App Store or Mac App Store immediately. The small application window can be left open while people work on their computers.
AppDays displays discounted apps in the stores. It sports filters available for price (Mac and iOS) and category (iOS only).