It used to be somewhat confusing with two mobile apps (K2 Workspace and K2 Mobile) for two platforms (iOS and Android), but recently updated K2 Mobile Applications help landing page makes things clear right off the bat making it easy for you to navigate to the right information:
There is also couple of useful links on the bottom of new landing page, namely Distributing K2 Mobile Application with MDM and K2 Mobile Support Policy:
K2 Mobile Applications Documentation Landing Page – Additional Resources
Really good job on K2 documentation team side 🙂 I really see that product documentation becomes better and easier to use.