iPadOS 9.0 (build 13A344) is an official Apple over-the-air update for the iPad Air (WiFi), released on 2015-09-16T18:02:10Z. The update package is 1.06 GB. This is a delta (partial) update that requires 8.4.1 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 95e41083aa18944031cda8661f6d9b02c147710e.zip.