Omni Group recently updated OmniGraffle, its workflow diagramming app, to version 6.0. It was a major update that included a brand-new UI, Retina display support and a ton of new features. When it launched, version 6 was only available on Omni Group's online storefront. Omni Group announced that starting today, a Mac App Store version will be available for you to purchase and download.
The Mac App Store app has all the features of the store-bought version. It even includes upgrade pricing via an in-app purchase. Omni Group is selling the standard version of OmniGraffle 6 in the Mac App Store for US$99, with an in-app purchase to unlock Pro features like AppleScript, Visio import/export and more. The amount of this in-app purchase will vary based upon whether you own a previous Mac App Store version of OmniGraffle.
To receive the upgrade pricing to the Pro version, current Mac App Store customers must install OmniGraffle 5 from the App Store. Once version 5 is installed, you need to purchase version 6 from the Mac App Store for $99. Then open the newly installed OmniGraffle 6 app and select "Upgrade to Professional" from the menu. The app will ask you to locate your OmniGraffle 5 install. If you own the standard version of OmniGraffle 5, then you'll be prompted to spend $50 to upgrade to the Pro version. If you already own the pro version of OmniGraffle 5, the in-app upgrade to enable to the pro features of OmniGraffle 6 will be free.