# ICM X Ref vs Acme HVAC Pro+

The clearest difference is ratings volume: Acme HVAC Pro+ at 12 against ICM X Ref's 1. ICM X Ref's advantage is monetization model (free vs ad-supported) and iOS requirement (9.0 vs 16.0). On price, rating, update cadence 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 X Ref against 5.0 for Acme HVAC Pro+. That said, the two scores are not equally well evidenced: Acme HVAC Pro+ has 12 ratings behind it against 1, so its average is the more settled of the two.

ICM X Ref ships an update every 2 months, Acme HVAC Pro+ every 6 weeks. The most recent releases landed on October 21, 2026 and October 12, 2026 respectively.

## The numbers

| Metric | ICM X Ref | Acme HVAC Pro+ |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [5.0 (1 ratings)](https://appshunter.io/ios/app/icm-x-ref/id1198779447/reviews) | [5.0 (12 ratings)](https://appshunter.io/ios/app/acme-hvac-pro-plus/id1596967034/reviews) |
| Number of ratings | 1 | **12** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 6 weeks** |
| Monetization | **Free** | Ad-supported |
| Size | 50 MB | 165 MB |
| Requires iOS | **9.0** | 16.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [ICM controls corp](https://appshunter.io/developer/879929077) | [Watsco, Inc.](https://appshunter.io/developer/510378878) |

## What reviewers say

### ICM X Ref

[App page](https://appshunter.io/ios/app/icm-x-ref/id1198779447)

This application allows users to search for ICM part numbers as aftermarket replacements for OEM products. It also helps locate nearby distributors and provides direct access to ICM technical support.

**Highlights:** Search ICM part numbers, Find aftermarket replacements, Locate distributors, Contact technical support

**Features:** macOS Compatibility

**In-app purchases:** none


### Acme HVAC Pro+

[App page](https://appshunter.io/ios/app/acme-hvac-pro-plus/id1596967034)

Access product information, pricing, and order status. Find locations, search equipment, and submit warranty claims. Connect with technical support and manage inventory.

**Highlights:** View pricing and order status, Find locations and get directions, Search equipment and parts, Verify warranty registrations, Access spec sheets and diagrams, Live technical support chat, Inventory replenishment tool

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

**In-app purchases:** none


## Frequently asked questions

### Is ICM X Ref free?

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

### Is Acme HVAC Pro+ free?

Acme HVAC Pro+ is free to download, with no in-app purchases.

### Which has better reviews, ICM X Ref or Acme HVAC Pro+?

ICM X Ref and Acme HVAC Pro+ are both rated 5.0 out of 5 on the App Store, from 1 and 12 ratings respectively.

### Do ICM X Ref or Acme HVAC Pro+ have ads?

Neither ICM X Ref nor Acme HVAC Pro+ shows ads.

### Which is updated more often, ICM X Ref or Acme HVAC Pro+?

ICM X Ref ships an update every 2 months, and Acme HVAC Pro+ every 6 weeks. Most recently, ICM X Ref was updated on October 21, 2026 and Acme HVAC Pro+ on October 12, 2026.

---

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