The current release of Storyist 3. Requires OS X 10.9 Mavericks or later.
For OS X 10.4 Tiger through OS 10.10 Yosemite. Accepts both Storyist 2 and Storyist 3 license codes. Note: Storyist 2 is not compatible with Mac OS X 10.11 El Capitan or later.
Storyist for iOS is available on the App Store. Requires iOS 8 or later.