LimA is available in two user interfaces, the LimA Pro and LimAQ interface. Every LimA license includes the LimA Pro interface but the LimAQ interface can be added to any LimA Pro installation from version 19.2.3 or later. The main difference between the two is their range of functions and how the user interacts with them. To make it short, if you are looking to compute individual noise projects and you appreciate an intuitive GIS environment, we recommend you purchase the QGIS plugin. If you lean more towards large-volume projects that need automated model prepping and computation, we recommend you dive into the LimA Pro environment to make the most out of Lima's superb batch scripting and macro language capabilities.