Once an app is downloaded it will then work without an internet connection. This makes it perfect for venues with poor wifi coverage, and for outside areas.
In fact, it’s the best of both worlds because if the app detects an internet connection when it opens it will check the Situate server to see if there have been any content updates and if so it will download them. That way the content stays up to date and allows you to incorporate time-specific content such as events, announcements, changing exhibitions and so on.