iOS Question iOS push notifications sometimes not delivered — topic vs token reliability?

[marcick]

Hi all,

regarding the issue that sometimes iOS push notifications, although reported as successfully sent, do not actually reach the recipient:
is there, in theory, any difference in reliability when sending to a topic instead of directly to a device token?

Thanks for any clarification.

 

[Erel]

although reported as successfully sent

The report you get on the server side means that the request has reached Firebase servers successfully. It doesn't tell you whether the message was actually delivered.

any difference in reliability when sending to a topic instead of directly to a device token?

I don't see any reason for them to behave differently. Handling tokens is more challenging as they are changed quite often and you need to monitor these changes.