Which Power BI version allows for the creation of calculated columns?

Power BI Desktop is the correct choice for creating calculated columns. This desktop application serves as a comprehensive development environment where users can import data, transform it, create data models, and build visualizations all in one place. Calculated columns are created using Data Analysis Expressions (DAX) and are crucial for adding new data fields to your data model based on existing data.

Power BI Desktop allows for a rich set of functionalities, including the manipulation of data modeling, which is essential for deriving insights and improving analytical capabilities. Users can create calculated columns directly in the data view, enhancing the data model before deploying reports to the Power BI Service or any other platform.

In contrast, other options like Power BI Service do not support the creation of calculated columns in the same manner, as it primarily serves as a cloud-based platform for report sharing and collaboration rather than for detailed data manipulation. Power BI Report Server primarily holds on-premises reports and manages data, but creation or editing of calculated columns is typically done in Power BI Desktop before publishing to the server. Power BI Mobile is focused on accessing and viewing reports and dashboards, and it does not support data modeling or calculated column creation at all.