If you ask Microsoft Copilot if it's a web app, it answers in the negative. Technically, as the AI points out, Copilot now interfaces with you through an Edge-based web app installed on your Windows 11 PC, but the model lives elsewhere in the cloud.
And said Copilot app is getting a helpful new feature, according to Windows Latest, referred to as PC Insights. This will allow it to connect to Windows APIs and analyse your system hardware, answering questions like "what is my current CPU usage" and helping you find what might be slowing down your PC.