# HVAC Load Plus vs Thermal Engineering Calc

The clearest difference is price: Thermal Engineering Calc at $2.99 against HVAC Load Plus's $24.99. Thermal Engineering Calc also leads on rating (4.7 vs 2.8) and in-app purchases (none vs 1). HVAC Load Plus's advantage is review sentiment (60% vs 50%) and iOS requirement (13.0 vs 16.1). On ratings volume, update cadence, ads and monetization model there is nothing between them.

HVAC Load Plus costs $24.99 and Thermal Engineering Calc $2.99 up front. HVAC Load Plus sells 1 one-off in-app purchase. Thermal Engineering Calc asks for nothing beyond the download.

Thermal Engineering Calc holds the better App Store score, 4.7 against 2.8. Both are backed by a comparable volume of ratings — 5 and 6 respectively. Written reviews complicate that: 60% of HVAC Load Plus's written reviews are positive against 50% of Thermal Engineering Calc's, so the app with the better star average is not the one people write more warmly about.

HVAC Load Plus ships an update every 9 months, Thermal Engineering Calc every 15 months. The most recent releases landed on October 15, 2026 and October 6, 2026 respectively.

## The numbers

| Metric | HVAC Load Plus | Thermal Engineering Calc |
| --- | --- | --- |
| Price | $24.99 | **$2.99** |
| Rating | [2.8 (5 ratings)](https://appshunter.io/ios/app/hvac-load-plus/id381608273/reviews) | **[4.7 (6 ratings)](https://appshunter.io/ios/app/thermal-engineering-calc/id684142208/reviews)** |
| Number of ratings | 5 | **6** |
| Positive reviews | **60.0% of reviews** | 50.0% of reviews |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 9 months** | Every 15 months |
| Monetization | Paid | Paid |
| Size | 18 MB | 3 MB |
| Requires iOS | **13.0** | 16.1 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Carmel Software Corporation](https://appshunter.io/developer/317970398) | [V PUGAZHENTHI](https://appshunter.io/developer/491898049) |

## What reviewers say

### HVAC Load Plus

[App page](https://appshunter.io/ios/app/hvac-load-plus/id381608273)

Perform detailed heating and cooling load calculations for buildings in the field using your iPhone. Access a vast weather database and construction data to generate comprehensive reports that can be emailed or exported to spreadsheets.

**Highlights:** Detailed heating and cooling load calculations, 1000+ city weather database, Extensive construction type data, Unlimited project creation and storage, Comprehensive load breakdown reports, Emailable HTML reports with spreadsheet attachments, Company information display on reports

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| HVAC Equipment Locator | $9.99 | one-time |


### Thermal Engineering Calc

[App page](https://appshunter.io/ios/app/thermal-engineering-calc/id684142208)

This app provides 44 calculators for thermal engineering parameters, along with thermodynamics tables, formulas, and definitions. It's a comprehensive tool for mechanical engineers and students needing to perform various thermal calculations.

**Highlights:** 44 thermal engineering calculators, Thermodynamics tables, Formulas and definitions, Carnot and Rankine efficiency calculators, Heat transfer calculations, Temperature conversion

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

**In-app purchases:** none


## Frequently asked questions

### Is HVAC Load Plus free?

HVAC Load Plus costs $24.99, and also offers in-app purchases.

### Is Thermal Engineering Calc free?

Thermal Engineering Calc costs $2.99, with no in-app purchases.

### Which has better reviews, HVAC Load Plus or Thermal Engineering Calc?

Thermal Engineering Calc is rated higher. HVAC Load Plus averages 2.8 out of 5 from 5 ratings, while Thermal Engineering Calc averages 4.7 from 6 ratings.

### Do HVAC Load Plus or Thermal Engineering Calc have ads?

Neither HVAC Load Plus nor Thermal Engineering Calc shows ads.

### Which is updated more often, HVAC Load Plus or Thermal Engineering Calc?

HVAC Load Plus ships an update every 9 months, and Thermal Engineering Calc every 15 months. Most recently, HVAC Load Plus was updated on October 15, 2026 and Thermal Engineering Calc on October 6, 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.*