The software implementation and the interface of JThermodynamicsCloud is on the cloud. For the user this means that JThermodynamicCloud is accessed through basically any web-browser without the need to install software on a local system. Individualized data would be accessed through the user's login account.
In the background, behind the user interface (for those more software technically inclined), the actual calculations and database access and manipulation are accessed through a set of RESTful web services. The interface and the services are on the Google Cloud Platform. using the Firebase system for, for example, user authentification and the database. The database information uses a noSQL document based database Firestore.