What is the difference between Merlin Project and Merlin Server?
Merlin Server is an add-on to the basic software Merlin Project.
You work with Merlin Project on your local Mac. Your project are generated and maintained there. Whenever you like to work at the same time or together with others (project members or devices), you may use Merlin Server. Merlin Server is a separated product, which has to be installed on your Mac. It is no cloud service.
Publish your project via Merlin Server. Afterwards other project members of devices can subscribe to your project - e. g. with Merlin Project Go on the iPhone or iPad. It will be loaded on your device and also only modified there.
Whenever this device is connected to the internet, the local Merlin Project tries to communicate with Merlin Server, in order to synchronize modifications.
You do not have to do anything about it, everything is happening in the background. In case your are offline, Merlin Project is waiting patiently until you are back online.