# e vs HVAC Decoder

The clearest difference is price: e at Free against HVAC Decoder's $9.99. e also leads on rating (4.8 vs 4.0) and update cadence (every 2 months vs every 3 months). HVAC Decoder's advantage is review sentiment (69% vs 50%) and chart position (#200 vs unranked). On ratings volume, ads, in-app purchases and device support there is nothing between them.

e is free to download; HVAC Decoder costs $9.99 up front. Neither carries in-app purchases, so what you see is what you pay.

e holds the better App Store score, 4.8 against 4.0. Both are backed by a comparable volume of ratings — 59 and 28 respectively. Written reviews complicate that: 50% of e's written reviews are positive against 69% of HVAC Decoder's, so the app with the better star average is not the one people write more warmly about.

e ships an update every 2 months, HVAC Decoder every 3 months. The most recent releases landed on September 14, 2026 and September 21, 2026 respectively.

## The numbers

| Metric | e | HVAC Decoder |
| --- | --- | --- |
| Price | **Free** | $9.99 |
| Rating | **[4.8 (59 ratings)](https://appshunter.io/ios/app/e-saver-residential/id427278496/reviews)** | [4.0 (28 ratings)](https://appshunter.io/ios/app/hvac-decoder/id1355543096/reviews) |
| Number of ratings | **59** | 28 |
| Positive reviews | 50.0% of reviews | **68.8% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 2 months** | Every 3 months |
| Monetization | **Free** | Paid |
| Best chart rank | — | **#200** |
| Size | 20 MB | 6 MB |
| Requires iOS | **12.0** | 14.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Copeland LP](https://appshunter.io/developer/464252882) | [Charles Cope](https://appshunter.io/developer/1355543095) |

## What reviewers say

### e

[App page](https://appshunter.io/ios/app/e-saver-residential/id427278496)

This app helps residential HVAC contractors quickly calculate annual cost savings for homeowners when considering system replacements. It offers up to three replacement options and compares them against current industry standards or user-defined systems. Calculations are based on heating and cooling run hours and local energy prices.

**Highlights:** Instant annual cost savings calculations, Up to 3 replacement system options, Comparison to industry minimum standards, User-defined replacement system input, Automatic location-based energy price updates, Email comparison reports

**Features:** macOS Compatibility

**In-app purchases:** none


### HVAC Decoder

[App page](https://appshunter.io/ios/app/hvac-decoder/id1355543096)

**Currently charting:** #200 Top Paid · Utilities (US App Store)

Decode HVAC model and serial numbers from major brands. This utility app provides thousands of model numbers and can email search results. It supports a wide range of HVAC equipment and offers close matches for unknown numbers.

**Highlights:** Decode HVAC model numbers, Decode HVAC serial numbers, Supports major HVAC brands, Thousands of model numbers, Email search results, Close match functionality, Report missing data

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

**In-app purchases:** none


## Frequently asked questions

### Is e free?

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

### Is HVAC Decoder free?

HVAC Decoder costs $9.99, with no in-app purchases.

### Which has better reviews, e or HVAC Decoder?

e is rated higher. e averages 4.8 out of 5 from 59 ratings, while HVAC Decoder averages 4.0 from 28 ratings.

### Do e or HVAC Decoder have ads?

Neither e nor HVAC Decoder shows ads.

### Which is updated more often, e or HVAC Decoder?

e ships an update every 2 months, and HVAC Decoder every 3 months. Most recently, e was updated on September 14, 2026 and HVAC Decoder on September 21, 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.*