Push notifications in PhoneGap app (iOS, Android) - how to implement?

Question

Android

There is a PhoneGap application and I want to add push notifications there.
What would you recommend to use in terms of ease of connection and use and the availability of step-by-step instructions?
I look at the free onesignal.com, it seems that the instructions are not difficult, but of course you have to try.
Push notifications will come if the application is not running on the phone?

Answer 1

I have been using the onesignal service for more than two years - everything works without problems. there are statistics and many features in the form of delayed sending, geolocations, etc.
and yes, notifications come to a not running application