Follow this step-by-step reference document for downloading ThingWorx View for Windows 10 offline.
We do not have or support an offline mode for caching but currently on Android if you cache and bookmark an experience you can go offline and still use the cache to view your experience.
Both Android and iOS support caching when you view/download an experience but they are different on how caching works between the two.
The time limit is based on what the HTTP headers have for a time limit.
Hope it helps.