# HVAC Decoder vs HVACsim

The clearest difference is price: HVACsim at Free against HVAC Decoder's $9.99. HVACsim also leads on update cadence (every 2 months vs every 3 months). HVAC Decoder's advantage is rating (4.0 vs 2.6) and in-app purchases (none vs 1). On ratings volume, ads, device support and iOS requirement there is nothing between them.

HVACsim is free to download; HVAC Decoder costs $9.99 up front. HVACsim sells 1 one-off in-app purchase. HVAC Decoder asks for nothing beyond the download.

HVAC Decoder holds the better App Store score, 4.0 against 2.6. Both are backed by a comparable volume of ratings — 28 and 10 respectively.

HVAC Decoder ships an update every 3 months, HVACsim every 2 months. Both last shipped on October 7, 2026.

## The numbers

| Metric | HVAC Decoder | HVACsim |
| --- | --- | --- |
| Price | $9.99 | **Free** |
| Rating | **[4.0 (28 ratings)](https://appshunter.io/ios/app/hvac-decoder/id1355543096/reviews)** | [2.6 (10 ratings)](https://appshunter.io/ios/app/hvacsim/id6740935191/reviews) |
| Number of ratings | **28** | 10 |
| Positive reviews | 68.8% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 3 months | **Every 2 months** |
| Monetization | Paid | **Free with in-app purchases** |
| Size | 6 MB | 20 MB |
| Requires iOS | 14.0 | **13.4** |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Charles Cope](https://appshunter.io/developer/1355543095) | [Nauman Innovation Group LLC](https://appshunter.io/developer/1764933586) |

## What reviewers say

### HVAC Decoder

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

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


### HVACsim

[App page](https://appshunter.io/ios/app/hvacsim/id6740935191)

This app offers interactive learning and real-world data analysis to help HVAC professionals diagnose and troubleshoot systems. It provides personalized training plans, skill assessments, and team management tools for contractors.

**Highlights:** Technical Knowledge Evaluator, Individualized Learning Plans, Real-World Data Analysis, Team Management Tools, Continuous Learning Library

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Full Access | $29.99 | one-time |


## Frequently asked questions

### Is HVAC Decoder free?

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

### Is HVACsim free?

HVACsim is free to download, with in-app purchases available.

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

HVAC Decoder is rated higher. HVAC Decoder averages 4.0 out of 5 from 28 ratings, while HVACsim averages 2.6 from 10 ratings.

### Do HVAC Decoder or HVACsim have ads?

Neither HVAC Decoder nor HVACsim shows ads.

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

HVAC Decoder ships an update every 3 months, and HVACsim every 2 months. Most recently, HVAC Decoder was updated on October 7, 2026 and HVACsim on October 7, 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.*