# Ruud Calcu Save vs EWC Controls, LLC

The clearest difference is rating: EWC Controls, LLC at 5.0 against Ruud Calcu Save's 4.3. EWC Controls, LLC also leads on update cadence (every 9 days vs every 2 months). Ruud Calcu Save's advantage is ratings volume (39 vs 5) and iOS requirement (12.0 vs 16.4). On price, review sentiment, 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.

EWC Controls, LLC holds the better App Store score, 5.0 against 4.3. That said, the two scores are not equally well evidenced: Ruud Calcu Save has 39 ratings behind it against 5, so its average is the more settled of the two. Written reviews split almost evenly too, at 100% and 100% positive.

Ruud Calcu Save ships an update every 2 months, EWC Controls, LLC every 9 days. The most recent releases landed on October 21, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | Ruud Calcu Save | EWC Controls, LLC |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.3 (39 ratings)](https://appshunter.io/ios/app/ruud-calcu-save/id1110122303/reviews) | **[5.0 (5 ratings)](https://appshunter.io/ios/app/ewc-controls-llc/id1456560692/reviews)** |
| Number of ratings | **39** | 5 |
| Positive reviews | 100.0% of reviews | 100.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 9 days** |
| Monetization | Free | Free |
| Size | 37 MB | 38 MB |
| Requires iOS | **12.0** | 16.4 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Copeland LP](https://appshunter.io/developer/464252882) | [EWC Controls, Inc.](https://appshunter.io/developer/1456560691) |

## What reviewers say

### Ruud Calcu Save

[App page](https://appshunter.io/ios/app/ruud-calcu-save/id1110122303)

This app helps HVAC contractors calculate and present cost savings for homeowners when replacing residential HVAC systems. It generates professional reports comparing different system options and current industry standards, which can be emailed to customers.

**Highlights:** Calculate HVAC replacement cost savings, Compare multiple system options, Generate graphical reports, Email reports to customers, Compare against industry minimum standards

**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 Ruud Calcu Save free?

Ruud Calcu Save is free to download, 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, Ruud Calcu Save or EWC Controls, LLC?

EWC Controls, LLC is rated higher. Ruud Calcu Save averages 4.3 out of 5 from 39 ratings, while EWC Controls, LLC averages 5.0 from 5 ratings.

### Do Ruud Calcu Save or EWC Controls, LLC have ads?

Neither Ruud Calcu Save nor EWC Controls, LLC shows ads.

### Which is updated more often, Ruud Calcu Save or EWC Controls, LLC?

Ruud Calcu Save ships an update every 2 months, and EWC Controls, LLC every 9 days. Most recently, Ruud Calcu Save was updated on October 21, 2026 and EWC Controls, LLC 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.*