Progressier is a solution that allows you to implement PWA functionality into your web app. Because we eat our own dog food, it's also a PWA itself! Here is how you can use it to send push notifications from your smartphone.
Install the Progressier PWA on your mobile now. Open the following page https://install.page/progressier, click or tap on the Install button and then follow the instructions. This link allows you to install the Progressier PWA on any iPhone, iPad, Android phone, macOS, or Windows computer.
Locate the app icon on your phone, then long-press and tap New Push Campaign. A double click on the icon in your Windows Taskbar opens a similar menu. Those are called App Shortcuts by the way.
Fill out the details of your push notification, choose images, add action buttons, and select who will receive this notification. When you're done, click Send now at the bottom of the screen. Your notification will be sent to all your users!