# Rheem Calcu Save vs EWC Controls, LLC

The clearest difference is review sentiment: EWC Controls, LLC at 100% against Rheem Calcu Save's 0%. EWC Controls, LLC also leads on rating (5.0 vs 4.3) and update cadence (every 9 days vs every 2 months). Rheem Calcu Save's advantage is ratings volume (44 vs 5) and iOS requirement (12.0 vs 16.4). On price, ads, in-app purchases and monetization model 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: Rheem Calcu Save has 44 ratings behind it against 5, so its average is the more settled of the two. Written reviews point the same way: 0% of Rheem Calcu Save's written reviews are positive against 100% of EWC Controls, LLC's.

Rheem Calcu Save ships an update every 2 months, EWC Controls, LLC every 9 days. Both last shipped on November 2, 2026.

## The numbers

| Metric | Rheem Calcu Save | EWC Controls, LLC |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.3 (44 ratings)](https://appshunter.io/ios/app/rheem-calcu-save/id1110121420/reviews) | **[5.0 (5 ratings)](https://appshunter.io/ios/app/ewc-controls-llc/id1456560692/reviews)** |
| Number of ratings | **44** | 5 |
| Positive reviews | 0.0% 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 | 20 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

### Rheem Calcu Save

[App page](https://appshunter.io/ios/app/rheem-calcu-save/id1110121420)

This app helps HVAC contractors quickly calculate and present potential cost savings to homeowners when comparing residential HVAC system replacements. It generates professional reports showing annual savings for high-efficiency systems, aiding customer decision-making.

**Highlights:** Calculate HVAC system replacement cost savings, Compare multiple replacement options, Generate professional graphical reports, Email reports to customers, Uses Emerson Climate Technologies OPI database, Compares 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 Rheem Calcu Save free?

Rheem 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, Rheem Calcu Save or EWC Controls, LLC?

EWC Controls, LLC is rated higher. Rheem Calcu Save averages 4.3 out of 5 from 44 ratings, while EWC Controls, LLC averages 5.0 from 5 ratings.

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

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

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

Rheem Calcu Save ships an update every 2 months, and EWC Controls, LLC every 9 days. Most recently, Rheem Calcu Save was updated on November 2, 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.*