# Bluon HVAC vs One Onsite

The clearest difference is rating: Bluon HVAC at 4.8 against One Onsite's 2.5. Bluon HVAC also leads on review sentiment (55% vs 23%) and ratings volume (4.5K vs 98). One Onsite's advantage is ads (none vs shown) and monetization model (free vs ad-supported). On price, update cadence, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Bluon HVAC holds the better App Store score, 4.8 against 2.5. That said, the two scores are not equally well evidenced: Bluon HVAC has 4.5K ratings behind it against 98, so its average is the more settled of the two. Written reviews point the same way: 55% of Bluon HVAC's written reviews are positive against 23% of One Onsite's.

Bluon HVAC ships an update monthly, One Onsite every 5 weeks. Both last shipped on September 24, 2026.

## The numbers

| Metric | Bluon HVAC | One Onsite |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.8 (4.5K ratings)](https://appshunter.io/ios/app/bluon-hvac/id1357521880/reviews)** | [2.5 (98 ratings)](https://appshunter.io/ios/app/one-onsite/id1642547378/reviews) |
| Number of ratings | **4.5K** | 98 |
| Positive reviews | **55.0% of reviews** | 23.1% of reviews |
| In-app purchases | No | No |
| Ads | Yes | **No** |
| Update frequency | **Monthly** | Every 5 weeks |
| Monetization | Ad-supported | **Free** |
| Size | 170 MB | 117 MB |
| Requires iOS | 15.1 | **15.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Bluon, Inc.](https://appshunter.io/developer/1357521879) | [SMS ASSIST, LLC](https://appshunter.io/developer/616469901) |

## 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


### One Onsite

[App page](https://appshunter.io/ios/app/one-onsite/id1642547378)

This app assists facilities maintenance technicians in completing work orders efficiently. It provides detailed information, guides users to locations, and streamlines data collection for back-office reporting. The application is designed for ease of use with minimal training required.

**Highlights:** View daily work orders, Access issue and location details, Review historical service information, Guided task completion flow, Offline and low-connectivity performance, Faster data upload, Battery optimization

**Features:** Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Bluon HVAC free?

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

### Is One Onsite free?

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

### Which has better reviews, Bluon HVAC or One Onsite?

Bluon HVAC is rated higher. Bluon HVAC averages 4.8 out of 5 from 4.5K ratings, while One Onsite averages 2.5 from 98 ratings.

### Do Bluon HVAC or One Onsite have ads?

Bluon HVAC shows ads; One Onsite does not.

### Which is updated more often, Bluon HVAC or One Onsite?

Bluon HVAC ships an update monthly, and One Onsite every 5 weeks. Most recently, Bluon HVAC was updated on September 24, 2026 and One Onsite on September 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.*