# AirBilly — Adjusted Air

> Adjusted Air (iPhone/iPad app by Rex Harris.)

- Source: https://appshunter.io/ios/app/airbilly/id6748755398 (this page in markdown: same URL + `.md`)
- Developer: [Rex Harris](https://appshunter.io/developer/1709578578)
- Category: Weather
- Price: Free
- Age rating: 4+
- Requires: iOS 16.6 · 1 MB
- Languages: English
- Released: 2025-07-18
- Data updated: 2026-01-26
- User reviews in markdown: https://appshunter.io/ios/app/airbilly/id6748755398/reviews.md

## What is AirBilly?

Displays adjusted air calculation results from functions of the user entered weather conditions. This adjusted air value is intended to be used to make engine tuning decisions for race applications.


## Version history (last 4 releases)

### 1.3 — 2025-08-26

Added equations with custom factors to automate predictions.

### 1.2 — 2025-08-14

Update: Version 1.2 has optional second order humidity correction for water grains.

### 1.1 — 2025-07-21

This version requires a password.

### 1.0 — 2025-07-18

No release notes.

## More apps by Rex Harris

- [JTR Calcs](https://appshunter.io/ios/app/jtr-calcs/id6468682017)
- [NeSmith's](https://appshunter.io/ios/app/nesmiths/id6475752633)

All apps by Rex Harris: https://appshunter.io/developer/1709578578

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-01-26.*