About Average ISA Deviation
Average ISA Deviation is a fast and precise utility designed for pro pilots who need to calculate the average ISA temperature deviation to correctly enter the DES FORECAST in the FMC of the Boeing 737 (NG / MAX) and other...
Average ISA Deviation is a fast and precise utility designed for pro pilots who need to calculate the average ISA temperature deviation to correctly enter the DES FORECAST in the FMC of the Boeing 737 (NG / MAX) and other aircraft. The app allows you to: . Quickly calculate the average ISA deviation . Reduce workload and potential errors during descent planning . Simplify calculations that are normally done manually . Work fully offline, ideal for cockpit use Designed by a pilot, for pilots. Legal Disclaimer This application is intended as an advisory and informational tool only. It does not replace official aeronautical charts, flight planning systems, company procedures, or regulatory guidance.
Version History • Improved overall user workflow • Minor interface refinements and stability improvements 3.1 12/21/2025 More intuitive functionality, iPhone supported version. 3.0 10/29/2024 This update from Apple will improve the functionality of this app. No new features are included. Code written in Swift language. App made for iOS 9.1. 2.0 11/12/2015 The range of static air temperature is wider 1.2 04/18/2014 Made for iOS 7. Rotation Capability. 1.1 03/14/2014 1.0 04/10/2013
Previous Versions
Here you can find the changelog of Average ISA Deviation since it was posted on our website on 2025-07-01 07:02:09.
The latest version is 3.1 and it was updated on 2026-06-10 20:12:52. See below the changes in each version.
Average ISA Deviation version 3.1
Updated At: 2026-06-10
Changes: Version History • Improved overall user workflow
• Minor interface refinements and stability improvements 3.1 12/21/2025 More intuitive functionality, iPhone supported version. 3.0 10/29/2024 This update from Apple will improve the functionality of this app. No new features are included.
Code written in Swift language. App made for iOS 9.1. 2.0 11/12/2015 The range of static air temperature is wider 1.2 04/18/2014 Made for iOS 7.
Rotation Capability. 1.1 03/14/2014 1.0 04/10/2013
Average ISA Deviation version 3.1
Updated At: 2025-12-21
Changes: • Improved overall user workflow
• Minor interface refinements and stability improvements
Average ISA Deviation version 3.0
Updated At: 2024-10-29
Changes: Oct 29, 2024
Version 3.0
More intuitive functionality, iPhone supported version.
Disclaimer
Official App Store Link
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