Galaxias Mobile has a local database to store the defined process (or the relevant steps) to be executed and stores any data locally till a network connection is available to upload the data to the Galaxias core component, which run either as a SaaS or as Galaxias Intra-muros in your company.
Galaxias Mobile can be seen a client app, and normally is used in that way, but it can be used stand-alone. The stand-alone use, however, has limited functionality in comparison with the server-based team tool.