# HVAC Load Plus vs PaulstraSoft

The clearest difference is price: PaulstraSoft at Free against HVAC Load Plus's $24.99. PaulstraSoft also leads on review sentiment (100% vs 60%) and in-app purchases (none vs 1). On update cadence, ads and device support there is nothing between them.

PaulstraSoft is free to download; HVAC Load Plus costs $24.99 up front. HVAC Load Plus sells 1 one-off in-app purchase. PaulstraSoft asks for nothing beyond the download.

HVAC Load Plus ships an update every 9 months, PaulstraSoft every 13 months. The most recent releases landed on October 15, 2026 and September 17, 2026 respectively.

## The numbers

| Metric | HVAC Load Plus | PaulstraSoft |
| --- | --- | --- |
| Price | $24.99 | **Free** |
| Rating | **[2.8 (5 ratings)](https://appshunter.io/ios/app/hvac-load-plus/id381608273/reviews)** | — |
| Number of ratings | **5** | — |
| Positive reviews | 60.0% of reviews | **100.0% of reviews** |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 9 months** | Every 13 months |
| Monetization | Paid | **Free** |
| Size | 18 MB | 138 MB |
| Requires iOS | 13.0 | **10.0** |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Carmel Software Corporation](https://appshunter.io/developer/317970398) | [HUTCHINSON](https://appshunter.io/developer/862345826) |

## 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 |


### PaulstraSoft

[App page](https://appshunter.io/ios/app/paulstrasoft/id1242874951)

This tool helps determine the right antivibration solution for machines by performing vibratory measurements. It offers functions for calculating attenuation, stops, and shock response, along with access to product datasheets.

**Highlights:** Vibratory measure, Vibratory attenuation calculation, Stops calculation, Shock response calculation, Product datasheet access

**Features:** macOS Compatibility

**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 PaulstraSoft free?

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

### Do HVAC Load Plus or PaulstraSoft have ads?

Neither HVAC Load Plus nor PaulstraSoft shows ads.

### Which is updated more often, HVAC Load Plus or PaulstraSoft?

HVAC Load Plus ships an update every 9 months, and PaulstraSoft every 13 months. Most recently, HVAC Load Plus was updated on October 15, 2026 and PaulstraSoft on September 17, 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.*