A Progressive Web App (PWA) is essentially a website that behaves like a mobile app. It’s accessed through a web browser but offers app-like features such as offline access, push notifications, and the ability to be installed on a device's home screen; without needing to go through app stores. PWA are built using standard web technologies like HTML, CSS, and JavaScript, and they’re designed to work on any device with a modern browser. They are lightweight, fast, and ideal for businesses looking to offer a mobile-friendly experience without the cost and complexity of native apps.

On the other hand, a Hybrid Mobile App is a real app that you download from app stores like Google Play or the Apple App Store. It’s also built using web technologies, but it runs inside a native container that allows it to access device features such as the camera, GPS, or file system; features that are often limited or unavailable in PWA. Hybrid apps offer more native-like functionality but may involve more development time and cost, especially when dealing with performance optimisation and app store compliance.