How many connections `FCM` & `APN` allows in parallel

Question

I have to know something. I want to know How many connections FCM & APN allows in parallel. I google it and find the FCM allows 1000 connections in parallel but did not know How many connections APN allows in parallel. I also want that is there any other way to increase the connections in FCM & APN .

Answer 1

t's better not to make any connections in parallel, it is recommended to reuse connections or close the connections after delivering Push notifications.

Also Apple suggests leave a connection open unless you know it will be idle. It appears a rule of thumb is 15 connections max .

Therefore, it's better not to increase the connections in APN. Connections via FCM has only limit of 1000 notifications at one go.

Also, check this SO post for more info.