# ACCA DuctWheel vs EWC Controls, LLC

The clearest difference is review sentiment: EWC Controls, LLC at 100% against ACCA DuctWheel's 45%. EWC Controls, LLC also leads on price (Free vs $24.99) and rating (5.0 vs 3.3). ACCA DuctWheel's advantage is iOS requirement (11.0 vs 16.4). On ratings volume, ads, in-app purchases and device support there is nothing between them.

EWC Controls, LLC is free to download; ACCA DuctWheel costs $24.99 up front. Neither carries in-app purchases, so what you see is what you pay.

EWC Controls, LLC holds the better App Store score, 5.0 against 3.3. Both are backed by a comparable volume of ratings — 13 and 5 respectively. Written reviews point the same way: 45% of ACCA DuctWheel's written reviews are positive against 100% of EWC Controls, LLC's.

ACCA DuctWheel ships an update every 44 months, EWC Controls, LLC every 9 days. The most recent releases landed on November 7, 2026 and November 2, 2026 respectively.

## The numbers

| Metric | ACCA DuctWheel | EWC Controls, LLC |
| --- | --- | --- |
| Price | $24.99 | **Free** |
| Rating | [3.3 (13 ratings)](https://appshunter.io/ios/app/acca-ductwheel/id424430207/reviews) | **[5.0 (5 ratings)](https://appshunter.io/ios/app/ewc-controls-llc/id1456560692/reviews)** |
| Number of ratings | **13** | 5 |
| Positive reviews | 45.5% of reviews | **100.0% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 44 months | **Every 9 days** |
| Monetization | Paid | **Free** |
| Size | 18 MB | 38 MB |
| Requires iOS | **11.0** | 16.4 |
| Devices | iPad | **iPhone, iPad** |
| Age rating | 4+ | 4+ |
| Developer | [Air Conditioning Contractors of America](https://appshunter.io/developer/380544391) | [EWC Controls, Inc.](https://appshunter.io/developer/1456560691) |

## What reviewers say

### ACCA DuctWheel

[App page](https://appshunter.io/ios/app/acca-ductwheel/id424430207)

This app simplifies HVAC duct sizing using ACCA's Manual D standard. It offers an interactive digital wheel for various duct types, pressure calculations, and environmental corrections. Save snapshots and switch between calculation wheels for efficient design.

**Highlights:** ACCA Manual D compliant, Digital duct sizing wheel, Supports various duct types, Converts round to rectangular ducts, Calculates pressure and friction rate, Altitude and temperature correction, Snapshot saving

**Features:** macOS Compatibility

**In-app purchases:** none


### 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, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is ACCA DuctWheel free?

ACCA DuctWheel costs $24.99, with no in-app purchases.

### Is EWC Controls, LLC free?

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

### Which has better reviews, ACCA DuctWheel or EWC Controls, LLC?

EWC Controls, LLC is rated higher. ACCA DuctWheel averages 3.3 out of 5 from 13 ratings, while EWC Controls, LLC averages 5.0 from 5 ratings.

### Do ACCA DuctWheel or EWC Controls, LLC have ads?

Neither ACCA DuctWheel nor EWC Controls, LLC shows ads.

### Which is updated more often, ACCA DuctWheel or EWC Controls, LLC?

ACCA DuctWheel ships an update every 44 months, and EWC Controls, LLC every 9 days. Most recently, ACCA DuctWheel was updated on November 7, 2026 and EWC Controls, LLC on November 2, 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.*