iPadOS 9.0 (build 13A344) is an official Apple over-the-air update for the iPad 4 (GSM), released on 2015-09-16T18:02:10Z. The update package is 1007.01 MB. This is a delta (partial) update that requires 8.2 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: c62ec0446a9422b5c5fffc6b3e3ed5eb87590b79.zip.