# Bluon HVAC vs HVACsim

The clearest difference is rating: Bluon HVAC at 4.8 against HVACsim's 2.6. Bluon HVAC also leads on in-app purchases (none vs 1) and ratings volume (4.5K vs 10). HVACsim's advantage is ads (none vs shown) and iOS requirement (13.4 vs 15.1). On price, update cadence and device support there is nothing between them.

Both are free to download. HVACsim sells 1 one-off in-app purchase. Bluon HVAC asks for nothing beyond the download.

Bluon HVAC holds the better App Store score, 4.8 against 2.6. That said, the two scores are not equally well evidenced: Bluon HVAC has 4.5K ratings behind it against 10, so its average is the more settled of the two.

Bluon HVAC ships an update monthly, HVACsim every 2 months. The most recent releases landed on September 24, 2026 and September 20, 2026 respectively.

## The numbers

| Metric | Bluon HVAC | HVACsim |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.8 (4.5K ratings)](https://appshunter.io/ios/app/bluon-hvac/id1357521880/reviews)** | [2.6 (10 ratings)](https://appshunter.io/ios/app/hvacsim/id6740935191/reviews) |
| Number of ratings | **4.5K** | 10 |
| Positive reviews | 55.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | Yes | **No** |
| Update frequency | **Monthly** | Every 2 months |
| Monetization | **Ad-supported** | Free with in-app purchases |
| Size | 170 MB | 20 MB |
| Requires iOS | 15.1 | **13.4** |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Bluon, Inc.](https://appshunter.io/developer/1357521879) | [Nauman Innovation Group LLC](https://appshunter.io/developer/1764933586) |

## What reviewers say

### Bluon HVAC

[App page](https://appshunter.io/ios/app/bluon-hvac/id1357521880)

Access a vast database of HVAC models, manuals, and part lists to speed up your work. Utilize an AI-powered troubleshooting tool or connect with experienced technicians for real-time support.

**Highlights:** 500,000+ HVAC unit database, Manuals and part lists, AI troubleshooting tool (MasterMechanic), Live support from veteran techs, HVAC industry upgrade tools

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

**In-app purchases:** none

**What reviewers like**

- 🤖 Helpful tech support
- 💯 Comprehensive database of manuals and information
- 🛠️ Useful tools and calculators
- 🤝 Great customer service

**What reviewers complain about**

- 💰 Paywall for advanced features
- 🔒 Limited access without company account
- 🔍 Missing manuals for some equipment models
- 🗣️ Removal of helpful forums

**Reported bugs**

- Login/password reset issues
- Frequent crashes or loading problems

**Requested features**

- Individual technician subscription option
- More comprehensive coverage of HVAC equipment models
- Ability to access full manuals without restrictions


### 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 Bluon HVAC free?

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

### Is HVACsim free?

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

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

Bluon HVAC is rated higher. Bluon HVAC averages 4.8 out of 5 from 4.5K ratings, while HVACsim averages 2.6 from 10 ratings.

### Do Bluon HVAC or HVACsim have ads?

Bluon HVAC shows ads; HVACsim does not.

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

Bluon HVAC ships an update monthly, and HVACsim every 2 months. Most recently, Bluon HVAC was updated on September 24, 2026 and HVACsim on September 20, 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.*