Website + ios application, how to organize?

Question

iOS

Good day everyone.
I want to implement a service for the university, something like a gradebook.
The teacher enters the grade on the site, the student receives a notification on the phone.
I have no experience in building such systems. Therefore, I would like to receive advice from knowledgeable people on organizing the structure of the service, using any technologies, bundles. Thank you.

Answer 1

parse.com. But keep in mind that this is "storage of personal data on servers outside the Russian Federation" with all the ensuing possible consequences after September 1.

Answer 2

What CMS is your site on? Here is a lesson on parsing news from a blog on Wordpress. Somehow it will help.

Answer 3

Read about push notifications