# VOS vs HVAC Manual Boss

The clearest difference is monetization model: VOS at free with in-app purchases against HVAC Manual Boss's subscription. VOS also leads on update cadence (every 3 days vs every 9 days) and ratings volume (8 vs 1). On price, rating, review sentiment and ads there is nothing between them.

Both are free to download. VOS sells 2 in-app purchases, starting at $14.99 per month and HVAC Manual Boss sells 1 in-app purchase, starting at $29.99 per month. Whichever you choose, the download price is not the number that matters.

On the App Store both sit at effectively the same score — 5.0 for VOS against 5.0 for HVAC Manual Boss. That said, the two scores are not equally well evidenced: VOS has 8 ratings behind it against 1, so its average is the more settled of the two. Written reviews split almost evenly too, at 100% and 100% positive.

VOS ships an update every 3 days, HVAC Manual Boss every 9 days. The most recent releases landed on November 3, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | VOS | HVAC Manual Boss |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [5.0 (8 ratings)](https://appshunter.io/ios/app/vos-remote-visual-support/id1592359276/reviews) | [5.0 (1 ratings)](https://appshunter.io/ios/app/hvac-manual-boss/id6761338720/reviews) |
| Number of ratings | **8** | 1 |
| Positive reviews | 100.0% of reviews | 100.0% of reviews |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Every 3 days** | Every 9 days |
| Monetization | **Free with in-app purchases** | Subscription |
| Size | 56 MB | 39 MB |
| Requires iOS | 16.4 | **15.1** |
| Devices | iPhone, iPad | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Virtually OnSite LLC](https://appshunter.io/developer/1592359278) | [John Kelley](https://appshunter.io/developer/1873680474) |

## What reviewers say

### VOS

[App page](https://appshunter.io/ios/app/vos-remote-visual-support/id1592359276)

This tool enables service, tech, sales, and construction professionals to perform remote assessments and diagnostics. It streamlines problem-solving by allowing users to diagnose and strategize from any location, reducing the need for on-site visits.

**Highlights:** Remote assessments, Remote diagnostics, Problem-solving, Intuitive interface, Cross-industry application

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| VOS Basic | $14.99 | per month |
| VOS Business | $49.99 | per month |


### HVAC Manual Boss

[App page](https://appshunter.io/ios/app/hvac-manual-boss/id6761338720)

This app streamlines HVAC load calculations, enabling users to quickly generate Manual J, S, and D outputs. It allows for on-the-spot pricing and uses real-world data for accurate estimates, even while on-site.

**Highlights:** Manual J load calculations, Manual D and S outputs, On-the-spot pricing, Real-world data integration, Major equipment brand access, On-site estimate generation

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Hvac Manual Boss | $29.99 | per month |


## Frequently asked questions

### Is VOS free?

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

### Is HVAC Manual Boss free?

HVAC Manual Boss is free to download, with in-app purchases available.

### Which has better reviews, VOS or HVAC Manual Boss?

VOS and HVAC Manual Boss are both rated 5.0 out of 5 on the App Store, from 8 and 1 ratings respectively.

### Do VOS or HVAC Manual Boss have ads?

Neither VOS nor HVAC Manual Boss shows ads.

### Which is updated more often, VOS or HVAC Manual Boss?

VOS ships an update every 3 days, and HVAC Manual Boss every 9 days. Most recently, VOS was updated on November 3, 2026 and HVAC Manual Boss on October 31, 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.*