> For the complete documentation index, see [llms.txt](https://docs.enercalc.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.enercalc.com/sel-faq/using-the-software/cloud-application/operation-mode.md). # Cloud App vs. Installed App Understanding the difference between the cloud and installed versions of ENERCALC SEL and where project data is saved. ## What is meant by Cloud App versus Installed App? ENERCALC SEL now exists as both an installed application and as a cloud application. The installed application is software that is located on the user's computer. This is the historical usage method of nearly all software. The cloud application is launched using an Internet link, and it runs within the user's web browser. The cloud app is no different than the installed app that runs on your local computer. ## Where is my project data being saved? When using the cloud application, project data is saved in the cloud. When running the installed application, the user has the option of saving project data as local project files, or in the cloud. This provides the flexibility to work with local project files when an Internet connection is not available, and to work with cloud based files when an Internet connection ***is*** available. In this way the application can be run from anywhere and use the same set of data files for ultimate usability. Cloud based files offer significant benefits: * Data is secure, * Data is continuously backed up, * Data can be shared among other members of the team. --- # Agent Instructions This documentation is published with GitBook. GitBook is the documentation platform designed so that both humans and AI agents can read, navigate, and reason over technical content effectively. Learn more at gitbook.com. ## Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter, and the optional `goal` query parameter: ``` GET https://docs.enercalc.com/sel-faq/using-the-software/cloud-application/operation-mode.md?ask=&goal= ``` `ask` is the immediate question: it should be specific, self-contained, and written in natural language. `goal` is optional and describes the broader end goal you are ultimately trying to accomplish on behalf of the user. GitBook uses it to tailor the answer towards what is most useful for that goal. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.