I use FCM in my social messaging app. Sometimes FCM messages can not be delivered from the server to client.
Is there any benefit to using OneSignal when I've got to do the full FCM setup as well in server and client sides?
I reviewed OneSignal documents this link: https://documentation.onesignal.com/docs/product-overview but I could not understand which was more useful.
I help work on OneSignal. Here are some reasons that OneSignal could be useful in this case.