# ICM Omni vs CaptiveAire Toolbox

The clearest difference is update cadence: CaptiveAire Toolbox at weekly against ICM Omni's monthly. ICM Omni's advantage is iOS requirement (14.0 vs 16.0). On price, rating, ratings volume and ads there is nothing between them.

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

On the App Store both sit at effectively the same score — 5.0 for ICM Omni against 5.0 for CaptiveAire Toolbox. Both are backed by a comparable volume of ratings — 1 and 1 respectively.

ICM Omni ships an update monthly, CaptiveAire Toolbox weekly. The most recent releases landed on October 31, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | ICM Omni | CaptiveAire Toolbox |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [5.0 (1 ratings)](https://appshunter.io/ios/app/icm-omni/id1668830205/reviews) | [5.0 (1 ratings)](https://appshunter.io/ios/app/captiveaire-toolbox/id6765656560/reviews) |
| Number of ratings | 1 | 1 |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Monthly | **Weekly** |
| Monetization | Free | Free |
| Size | 51 MB | 71 MB |
| Requires iOS | **14.0** | 16.0 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [ICM Controls Corp](https://appshunter.io/developer/879929077) | [Captive-Aire Systems, Inc.](https://appshunter.io/developer/1896026735) |

## What reviewers say

### ICM Omni

[App page](https://appshunter.io/ios/app/icm-omni/id1668830205)

This utility app allows users to reconfigure NFC-compatible devices by adjusting modes and parameters. Save custom settings, read device memory to confirm programming, and replace legacy ICM parts with ease.

**Highlights:** Reconfigure NFC compatible devices, Adjust device mode and parameters, Save custom device programs, Read device memory for confirmation, Replace legacy ICM parts

**In-app purchases:** none


### CaptiveAire Toolbox

[App page](https://appshunter.io/ios/app/captiveaire-toolbox/id6765656560)

This app provides over 40 HVAC and building-systems engineering calculators. It's designed for field use, offering standard industry formulas for cooling, heating, ventilation, electrical sizing, and more. Access detailed formula definitions and reference data.

**Highlights:** 40+ HVAC engineering calculators, Cooling and heating load calculations, Ventilation and airflow tools, Electrical sizing and motor circuits, Duct and piping pressure drop, Reference data and psychrometric chart

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

**In-app purchases:** none


## Frequently asked questions

### Is ICM Omni free?

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

### Is CaptiveAire Toolbox free?

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

### Which has better reviews, ICM Omni or CaptiveAire Toolbox?

ICM Omni and CaptiveAire Toolbox are both rated 5.0 out of 5 on the App Store, from 1 and 1 ratings respectively.

### Do ICM Omni or CaptiveAire Toolbox have ads?

Neither ICM Omni nor CaptiveAire Toolbox shows ads.

### Which is updated more often, ICM Omni or CaptiveAire Toolbox?

ICM Omni ships an update monthly, and CaptiveAire Toolbox weekly. Most recently, ICM Omni was updated on October 31, 2026 and CaptiveAire Toolbox on October 24, 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.*