# Hold Calculator Pro vs Airbox

The clearest difference is price: Airbox at Free against Hold Calculator Pro's $1.99. Hold Calculator Pro's advantage is update cadence (every 3 days vs every 3 weeks) and chart position (#178 vs unranked). On ads, in-app purchases and device support there is nothing between them.

Airbox is free to download; Hold Calculator Pro costs $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Hold Calculator Pro ships an update every 3 days, Airbox every 3 weeks. The most recent releases landed on November 7, 2026 and November 3, 2026 respectively.

## The numbers

| Metric | Hold Calculator Pro | Airbox |
| --- | --- | --- |
| Price | $1.99 | **Free** |
| Rating | **[3.0 (1 ratings)](https://appshunter.io/ios/app/hold-calculator-pro/id1515458700/reviews)** | — |
| Number of ratings | **1** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 3 days** | Every 3 weeks |
| Monetization | Paid | — |
| Best chart rank | **#178** | — |
| Size | 1 MB | 570 MB |
| Requires iOS | **13.4** | 15.0 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Rob Barltrop](https://appshunter.io/developer/1513961240) | [Airbox Systems Ltd](https://appshunter.io/developer/1538615853) |

## What reviewers say

### Hold Calculator Pro

[App page](https://appshunter.io/ios/app/hold-calculator-pro/id1515458700)

**Currently charting:** #178 Top Paid · Navigation (US App Store)

Master timed holding patterns in aviation with this app. It simplifies complex calculations for instrument students, providing visual aids for joining processes, wind correction angles, and recommended headings. Utilize device GPS for real-time wind data.

**Highlights:** Timed holding pattern mastery, Wind correction angle calculation, Recommended headings, Visual joining process understanding, In-flight instant wind calculation via GPS

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


### Airbox

[App page](https://appshunter.io/ios/app/airbox/id1538616608)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Hold Calculator Pro free?

Hold Calculator Pro costs $1.99, with no in-app purchases.

### Is Airbox free?

Airbox is free to download, with no in-app purchases.

### Do Hold Calculator Pro or Airbox have ads?

Neither Hold Calculator Pro nor Airbox shows ads.

### Which is updated more often, Hold Calculator Pro or Airbox?

Hold Calculator Pro ships an update every 3 days, and Airbox every 3 weeks. Most recently, Hold Calculator Pro was updated on November 7, 2026 and Airbox on November 3, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*