APN (Apple Push Notification) payload size limit

Question

In official documentation you can find the info:

Each push notification includes a payload. The payload contains information about how the system sh

Answer 1

Per the most recent official documentation, the payload limit is 4096 bytes or 2048 bytes for regular notifications, and 5120 bytes for VoIP notifications:

The maximum size of the payload depends on the notification you are sending:

• For regular remote notifications, the maximum size is 4KB (4096 bytes)
• For Voice over Internet Protocol (VoIP) notifications, the maximum size is 5KB (5120 bytes)

Note: If you are using the legacy APNs binary interface to send notifications instead of an HTTP/2 request, the maximum payload size is 2KB (2048 bytes).

Prior to iOS 8, the limit was 256 bytes.