There are Push notifications wordpress without plugin?

Prompt, whether really to find such a code Push notification or just the plugins?
The fact that all the plugins I've found require support from other resources, all these IPAS and the keys and the rest like trash.

I want to keep all subscribers in their database.
But alas, this plugin is not met.
Tell me, who knows?
June 7th 19 at 15:05
1 answer
June 7th 19 at 15:07
The website with https and web pushi

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