# UnitsConv vs HVAC Toolkit Lite

The clearest difference is rating: HVAC Toolkit Lite at 5.0 against UnitsConv's 4.3. HVAC Toolkit Lite also leads on update cadence (every 11 days vs every 4 months). UnitsConv's advantage is ratings volume (3 vs 1). On price, ads, in-app purchases and monetization model there is nothing between them.

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

HVAC Toolkit Lite holds the better App Store score, 5.0 against 4.3. Both are backed by a comparable volume of ratings — 3 and 1 respectively.

UnitsConv ships an update every 4 months, HVAC Toolkit Lite every 11 days. The most recent releases landed on October 14, 2026 and September 11, 2026 respectively.

## The numbers

| Metric | UnitsConv | HVAC Toolkit Lite |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.3 (3 ratings)](https://appshunter.io/ios/app/unitsconv/id1291109803/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/hvac-toolkit-lite/id1628371325/reviews)** |
| Number of ratings | **3** | 1 |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 4 months | **Every 11 days** |
| Monetization | Free | Free |
| Size | 8 MB | 61 MB |
| Requires iOS | 12.0 | 12.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [john selverian](https://appshunter.io/developer/1291109802) | [Mohamad Jaber](https://appshunter.io/developer/1623246777) |

## What reviewers say

### UnitsConv

[App page](https://appshunter.io/ios/app/unitsconv/id1291109803)

This app provides conversion factors for 28 common properties used in multiphysics simulations and finite element analysis. It's a free tool designed for engineers and researchers working with complex physical models.

**Highlights:** 28 conversion properties, Multiphysics simulation support, Finite element analysis (FEA) focus, Free to use, Supports iPhone, iPad, and iPod

**Features:** macOS Compatibility

**In-app purchases:** none


### HVAC Toolkit Lite

[App page](https://appshunter.io/ios/app/hvac-toolkit-lite/id1628371325)

This tool assists HVAC engineers with design checks and quick calculations. It offers various tools for ducting friction loss, pipe sizing, ventilation, and heat load estimations, providing instructions and formulas for each calculation.

**Highlights:** Friction loss calculation, Pipe sizing, Ventilation calculations, Heat load estimation, Pump head calculation, Fan ESP calculation, Metric/Imperial units, English/Arabic language support

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is UnitsConv free?

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

### Is HVAC Toolkit Lite free?

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

### Which has better reviews, UnitsConv or HVAC Toolkit Lite?

HVAC Toolkit Lite is rated higher. UnitsConv averages 4.3 out of 5 from 3 ratings, while HVAC Toolkit Lite averages 5.0 from 1 ratings.

### Do UnitsConv or HVAC Toolkit Lite have ads?

Neither UnitsConv nor HVAC Toolkit Lite shows ads.

### Which is updated more often, UnitsConv or HVAC Toolkit Lite?

UnitsConv ships an update every 4 months, and HVAC Toolkit Lite every 11 days. Most recently, UnitsConv was updated on October 14, 2026 and HVAC Toolkit Lite on September 11, 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.*