# EWC Controls, LLC vs Arzel Pro

The clearest difference is update cadence: EWC Controls, LLC at every 9 days against Arzel Pro's every 3 months. EWC Controls, LLC also leads on ratings volume (5 vs 1). On price, rating, ads and in-app purchases 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 EWC Controls, LLC against 5.0 for Arzel Pro. That said, the two scores are not equally well evidenced: EWC Controls, LLC has 5 ratings behind it against 1, so its average is the more settled of the two.

EWC Controls, LLC ships an update every 9 days, Arzel Pro every 3 months. The most recent releases landed on September 14, 2026 and June 26, 2026 respectively.

## The numbers

| Metric | EWC Controls, LLC | Arzel Pro |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [5.0 (5 ratings)](https://appshunter.io/ios/app/ewc-controls-llc/id1456560692/reviews) | [5.0 (1 ratings)](https://appshunter.io/ios/app/arzel-pro/id6670562268/reviews) |
| Number of ratings | **5** | 1 |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 9 days** | Every 3 months |
| Monetization | Free | Free |
| Size | 38 MB | 11 MB |
| Requires iOS | 16.4 | **15.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [EWC Controls, Inc.](https://appshunter.io/developer/1456560691) | [Arzel Technology, Inc.](https://appshunter.io/developer/644309533) |

## What reviewers say

### EWC Controls, LLC

[App page](https://appshunter.io/ios/app/ewc-controls-llc/id1456560692)

This app helps EWC contractors determine their zoning system requirements. It features a Bypass Calculator to recommend damper models and sizes, and a Control Panel Finder to suggest compatible control panels. Discover products and features to assist in setting up your zoning system.

**Highlights:** Bypass Damper Calculator, Control Panel Finder, Product Discovery, Zoning System Setup Assistance

**Features:** macOS Compatibility

**In-app purchases:** none


### Arzel Pro

[App page](https://appshunter.io/ios/app/arzel-pro/id6670562268)

This app allows HVAC contractors to configure and manage a universal zoning panel. It offers easy setup, diagnostics, and software updates via a Bluetooth connection. Homeowners control the system through installed thermostats.

**Highlights:** App-controlled zoning panel, Create up to 16 zones, One-tap equipment settings, Bluetooth configuration, System diagnostics, Software updates

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is EWC Controls, LLC free?

EWC Controls, LLC is free to download, with no in-app purchases.

### Is Arzel Pro free?

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

### Which has better reviews, EWC Controls, LLC or Arzel Pro?

EWC Controls, LLC and Arzel Pro are both rated 5.0 out of 5 on the App Store, from 5 and 1 ratings respectively.

### Do EWC Controls, LLC or Arzel Pro have ads?

Neither EWC Controls, LLC nor Arzel Pro shows ads.

### Which is updated more often, EWC Controls, LLC or Arzel Pro?

EWC Controls, LLC ships an update every 9 days, and Arzel Pro every 3 months. Most recently, EWC Controls, LLC was updated on September 14, 2026 and Arzel Pro on June 26, 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.*