# Engines **Engines** in Reasy are the app's essentials or building blocks. These app essentials collectively empower users, including citizen developers, to create a wide range of applications efficiently, from simple prototypes to complex business solutions, without the need for extensive coding expertise. These app essentials include: * **Interface Designer:** A drag-and-drop interface designer that allows you to create the application's user interface (UI) visually. This includes designing forms, screens, and layouts. * **Data Modeling:** Define and manage your app's data. This may involve creating databases, defining tables, setting up relationships, and specifying data types. * **Workflow Automation:** A visual interface for defining the application's business logic. You can configure rules, triggers, and actions to streamline and automate tasks within the app. * **API Services:** Allows you to stretch the app's capability to connect to external systems, databases, or services through pre-built connectors or custom APIs. This enables data exchange and interaction with other software. * **Resources:** Define all the resources such as email source, data source, and others to make them globally available throughout your app. * **User Management:** Tools for defining user roles, permissions, and access control to ensure security within the application. * **Multilingual Support:** Effortlessly convert your app to any other specific language with the built-in translators and virtual language keyboards. --- # Agent Instructions: 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: ``` GET https://help.reasy.ai/help/getting-started/engines.md?ask= ``` The question should be specific, self-contained, and written in natural language. 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.