UnitsConv vs HVAC Toolkit Lite
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
UnitsConv
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.
- 28 conversion properties
- Multiphysics simulation support
- Finite element analysis (FEA) focus
- Free to use
- Supports iPhone, iPad, and iPod
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Units conversion app with conversion factors for 28 properties commonly used in multiphysics simulations and finite element analysis (FEA).
HVAC Toolkit Lite
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.
- Friction loss calculation
- Pipe sizing
- Ventilation calculations
- Heat load estimation
- Pump head calculation
- Fan ESP calculation
- Metric/Imperial units
- English/Arabic language support
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The HVAC ToolKit Lite is an easy-to-use app that has been created to assist HVAC engineers in checking their designs and making quick calculations and estimations. The app includes helpful calculation tools for calculating friction losses in ducting, pipe sizing, parking ventilation, staircase pressurization, and estimating heat loads, pump head, fan ESP, among others, where the user is able to enter the required inputs and is given the calculated output. Each tool also includes instructions and abbreviated formulas that have been used to calculate the results. The app can be set to metric or imperial units and/or to the English or Arabic language. Users are expected to have some knowledge and understanding of HVAC engineering in order to use the tools properly. Users are also expected to check that the results are within an acceptable range for their respective projects. If you come across any inconsistencies while using the app or have any recommendations for additional inclusions, please contact us.
Screenshots
Verdict
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.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
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.
| Parameter | UnitsConv | HVAC Toolkit Lite |
|---|---|---|
| Price | Free | Free |
| Rating | 4.3 (3 ratings) | 5.0 (1 ratings) — better |
| Number of ratings | 3 — better | 1 |
| Update frequency | Every 4 months | Every 11 days — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 12.0 | 12.0 |
| Further details — not scored | ||
| Size | 8 MB | 61 MB |
| Age rating | 4+ | 4+ |
| Developer | john selverian | Mohamad Jaber |
Customer experience
UnitsConv
HVAC Toolkit Lite
In-app purchases
UnitsConv
No in-app purchases
HVAC Toolkit Lite
No in-app purchases
Questions
Is UnitsConv free?
Is HVAC Toolkit Lite free?
Which has better reviews, UnitsConv or HVAC Toolkit Lite?
Do UnitsConv or HVAC Toolkit Lite have ads?
Which is updated more often, UnitsConv or HVAC Toolkit Lite?
Other comparisons
