Appazur will provide you with a Progressive Web App for users who do not have an iOS or Android device, with text messages (SMS), email, and web browser pop-up notifications (web push). This works, for example, with ChromeOS (Chromebooks), Windows, and macOS.
However, a mobile-optimized website is not enough. Some ways an app can add value:
Redesigning an existing website for mobile can be a big project, so signing up for a customized school app from a specialized service provider like Appazur may be less expensive.