# Air System Modeling vs Keysight PMA

The clearest difference is update cadence: Air System Modeling at weekly against Keysight PMA's every 2 months. Air System Modeling also leads on iOS requirement (7.0 vs 12.0). 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.

Air System Modeling ships an update weekly, Keysight PMA every 2 months. Both last shipped on November 7, 2026.

## The numbers

| Metric | Air System Modeling | Keysight PMA |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Weekly** | Every 2 months |
| Size | 219 MB | 55 MB |
| Requires iOS | **7.0** | 12.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Ingersoll Rand](https://appshunter.io/developer/482314546) | [Keysight Technologies, Inc.](https://appshunter.io/developer/903911491) |

## What reviewers say

### Air System Modeling

[App page](https://appshunter.io/ios/app/air-system-modeling/id1081934192)

**Features:** macOS Compatibility

**In-app purchases:** none


### Keysight PMA

[App page](https://appshunter.io/ios/app/keysight-pma/id1638294353)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Air System Modeling free?

Air System Modeling is free to download, with no in-app purchases.

### Is Keysight PMA free?

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

### Do Air System Modeling or Keysight PMA have ads?

Neither Air System Modeling nor Keysight PMA shows ads.

### Which is updated more often, Air System Modeling or Keysight PMA?

Air System Modeling ships an update weekly, and Keysight PMA every 2 months. Most recently, Air System Modeling was updated on November 7, 2026 and Keysight PMA on November 7, 2026.

---

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