# QCAA vs Ostrum

The clearest difference is update cadence: Ostrum at every 6 weeks against QCAA's every 4 months. Ostrum also leads on iOS requirement (13.0 vs 15.1). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

QCAA ships an update every 4 months, Ostrum every 6 weeks. The most recent releases landed on September 9, 2026 and August 17, 2026 respectively.

## The numbers

| Metric | QCAA | Ostrum |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 4 months | **Every 6 weeks** |
| Size | 45 MB | 57 MB |
| Requires iOS | 15.1 | **13.0** |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Qatar Civil Aviation Authority](https://appshunter.io/developer/1341396403) | [Ostrum Tech Limited](https://appshunter.io/developer/1596744681) |

## What reviewers say

### QCAA

[App page](https://appshunter.io/ios/app/qcaa/id1608050319)

**Features:** macOS Compatibility

**In-app purchases:** none


### Ostrum

[App page](https://appshunter.io/ios/app/ostrum/id6447539444)

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

**In-app purchases:** none


## Frequently asked questions

### Is QCAA free?

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

### Is Ostrum free?

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

### Do QCAA or Ostrum have ads?

Neither QCAA nor Ostrum shows ads.

### Which is updated more often, QCAA or Ostrum?

QCAA ships an update every 4 months, and Ostrum every 6 weeks. Most recently, QCAA was updated on September 9, 2026 and Ostrum on August 17, 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.*