iPadOS 8.4.1 (build 12H321) is an official Apple over-the-air update for the iPad Air (WiFi), released on 2015-08-13T18:05:09Z. The update package is 1.2 GB. This is a delta (partial) update that requires 7.1 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 4809f1f2936a5e4c316c38e8fc9f83225b3c25e5.zip.