# Acceleration Calculator Plus vs Mean HVAC BS Tools

The clearest difference is price: Mean HVAC BS Tools at Free against Acceleration Calculator Plus's $2.99. Mean HVAC BS Tools also leads on update cadence (every 2 months vs every 20 months) and iOS requirement (15.1 vs 17.6). On ads, in-app purchases and device support there is nothing between them.

Mean HVAC BS Tools is free to download; Acceleration Calculator Plus costs $2.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Acceleration Calculator Plus ships an update every 20 months, Mean HVAC BS Tools every 2 months. The most recent releases landed on November 3, 2026 and October 30, 2026 respectively.

## The numbers

| Metric | Acceleration Calculator Plus | Mean HVAC BS Tools |
| --- | --- | --- |
| Price | $2.99 | **Free** |
| Rating | — | **[5.0 (4 ratings)](https://appshunter.io/ios/app/mean-hvac-bs-tools/id6621189879/reviews)** |
| Number of ratings | — | **4** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 20 months | **Every 2 months** |
| Monetization | — | Paid |
| Size | 1 MB | 54 MB |
| Requires iOS | 17.6 | **15.1** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Nitrio](https://appshunter.io/developer/321121189) | [Mean HVAC Consulting & Design LLC](https://appshunter.io/developer/1761936254) |

## What reviewers say

### Acceleration Calculator Plus

[App page](https://appshunter.io/ios/app/acceleration-calculator-plus/id1658922875)

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

**In-app purchases:** none


### Mean HVAC BS Tools

[App page](https://appshunter.io/ios/app/mean-hvac-bs-tools/id6621189879)

This utility app offers a suite of calculators for HVAC professionals, including psychrometric analysis, duct sizing, insulation R-value estimation, and air bypass calculations. It helps engineers and technicians quickly determine essential parameters for system design and analysis.

**Highlights:** Single Point Psychrometrics, Mixed Air Psychrometrics, Duct Calculator (CFM, Diameter, Friction, Velocity), Smallest Zone Calculator, Bypass Calculator (Cooling/Heating), IR Wall Insulation R-Value Estimation, Parallel R-Value Calculator, Unit Converter

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

**In-app purchases:** none


## Frequently asked questions

### Is Acceleration Calculator Plus free?

Acceleration Calculator Plus costs $2.99, with no in-app purchases.

### Is Mean HVAC BS Tools free?

Mean HVAC BS Tools is free to download, with no in-app purchases.

### Do Acceleration Calculator Plus or Mean HVAC BS Tools have ads?

Neither Acceleration Calculator Plus nor Mean HVAC BS Tools shows ads.

### Which is updated more often, Acceleration Calculator Plus or Mean HVAC BS Tools?

Acceleration Calculator Plus ships an update every 20 months, and Mean HVAC BS Tools every 2 months. Most recently, Acceleration Calculator Plus was updated on November 3, 2026 and Mean HVAC BS Tools on October 30, 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.*