I am looking for a program or plug-in that will send a notification to my phone.
The situation is as follows: I am using a website that does not have a mobile application, the only notification I receive about a new message is when I refresh the page (as in the attached photo, for example, there is the same bubble above the hammer as above the envelope when a message arrives). I would be interested in a plug-in or program (I plan to put it on Raspberry Pi, so on Linux) that will refresh the page every 5 minutes and if a red bubble appears above the envelope, it will notify me on my phone (Android, preferably on 2 devices), and then I will he could answer right away.
Thank you for all the suggestions, if it is not possible to use Linux, I can buy a small computer with Windows.

I tried searching on google but I couldn’t find anything 🙁