Which tool is used to build Appian applications?

The correct choice is Appian Designer, as it is the primary tool used for building and managing applications within the Appian environment. Appian Designer provides a user-friendly interface where developers and business analysts can create application components such as processes, interfaces, and rules. It integrates seamlessly with other elements of the Appian platform, enabling users to design complex workflows and information architectures easily.

In the context of application development, Appian Designer allows for real-time collaboration, testing, and deployment of applications. Users can utilize various features like drag-and-drop design, smart services, and pre-built templates to expedite the development process while ensuring adherence to best practices.

While the other tools mentioned may play supporting roles in the broader ecosystem, they do not serve as the primary application development platform. For instance, Appian Modeler is specifically geared toward process modeling and may not encompass the comprehensive application design capabilities that Appian Designer offers. Similarly, Appian Architect typically refers to a role or a persona responsible for overseeing the overall architecture and integration of systems within an Appian environment rather than a specific tool for app development. Appian Studio is not a commonly recognized term specifically linked to application building in Appian, further distinguishing Appian Designer as the focused, essential tool for creating applications