# GMB901 vs Aircrew Tools

The clearest difference is in-app purchases: GMB901 at none against Aircrew Tools's 1. GMB901 also leads on iOS requirement (15.6 vs 17.0). Aircrew Tools's advantage is update cadence (every 2 weeks vs every 2 months). On price, ads and device support there is nothing between them.

Both are free to download. Aircrew Tools sells 1 in-app purchase, starting at $12.99 per year. GMB901 asks for nothing beyond the download.

GMB901 ships an update every 2 months, Aircrew Tools every 2 weeks. The most recent releases landed on October 12, 2026 and October 10, 2026 respectively.

## The numbers

| Metric | GMB901 | Aircrew Tools |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (3 ratings)](https://appshunter.io/ios/app/aircrew-tools/id6461416880/reviews)** |
| Number of ratings | — | **3** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 2 weeks** |
| Monetization | — | Free with in-app purchases |
| Size | 7 MB | 107 MB |
| Requires iOS | **15.6** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Kwoon Chung Bus Holdings Limited](https://appshunter.io/developer/1065179267) | [7ition Limited](https://appshunter.io/developer/1463267798) |

## What reviewers say

### GMB901

[App page](https://appshunter.io/ios/app/gmb901/id1443698423)

**Features:** macOS Compatibility

**In-app purchases:** none


### Aircrew Tools

[App page](https://appshunter.io/ios/app/aircrew-tools/id6461416880)

This app provides essential tools for pilots facing cold weather conditions. It offers advanced features for holdover times and specialized functions for extreme environments, enhancing aviation safety and efficiency.

**Highlights:** Cold weather navigation tools, Advanced holdover time calculations, Specialized extreme condition features, Pilot companion for aviation, Enhances safety and efficiency

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Full Access Yearly Plan | $12.99 | per year |


## Frequently asked questions

### Is GMB901 free?

GMB901 is free to download, with no in-app purchases.

### Is Aircrew Tools free?

Aircrew Tools is free to download, with in-app purchases available.

### Do GMB901 or Aircrew Tools have ads?

Neither GMB901 nor Aircrew Tools shows ads.

### Which is updated more often, GMB901 or Aircrew Tools?

GMB901 ships an update every 2 months, and Aircrew Tools every 2 weeks. Most recently, GMB901 was updated on October 12, 2026 and Aircrew Tools on October 10, 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.*