iPadOS 9.0.1 (build 13A404) is an official Apple over-the-air update for the iPad 4 (WiFi), released on 2015-09-23T17:55:17Z. The update package is 25.48 MB. This is a delta (partial) update that requires 9.0 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 15b7586bba481874e4be9c211518e8aeb0e75684.zip.