
Please make an app so users can receive notifications.

That’s not necessary to provide notifications.
They can simply register a service worker running in background and providing notifications through the browser as background task.

..but if you’re talking about an installable Web Application that will get it’s Own Window as well ~ I very much agree.
That Increases Utility.
For Both Desktop & Mobile.

Nolt.io is already installable as PWA.
I just did so in Vivaldi.
So probably only the Service Worker for Notifications left to do.
(I searched for »nolt« on chrome://serviceworker-internals and got No Results.)