# HVAC ResLoad vs testo Smart

The clearest difference is price: testo Smart at Free against HVAC ResLoad's $199.99. testo Smart also leads on ratings volume (170 vs 8) and update cadence (every 2 months vs every 4 months). HVAC ResLoad's advantage is rating (3.4 vs 2.7) and in-app purchases (none vs 5). On ads and device support there is nothing between them.

testo Smart is free to download; HVAC ResLoad costs $199.99 up front. testo Smart sells 5 in-app purchases, starting at $6.99 per month. HVAC ResLoad asks for nothing beyond the download.

HVAC ResLoad holds the better App Store score, 3.4 against 2.7. That said, the two scores are not equally well evidenced: testo Smart has 170 ratings behind it against 8, so its average is the more settled of the two. Written reviews point the same way: 50% of HVAC ResLoad's written reviews are positive against 16% of testo Smart's.

HVAC ResLoad ships an update every 4 months, testo Smart every 2 months. The most recent releases landed on October 27, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | HVAC ResLoad | testo Smart |
| --- | --- | --- |
| Price | $199.99 | **Free** |
| Rating | **[3.4 (8 ratings)](https://appshunter.io/ios/app/hvac-resload-j/id567612484/reviews)** | [2.7 (170 ratings)](https://appshunter.io/ios/app/testo-smart/id1482139629/reviews) |
| Number of ratings | 8 | **170** |
| Positive reviews | **50.0% of reviews** | 16.3% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 4 months | **Every 2 months** |
| Monetization | Paid | **Free with in-app purchases** |
| Size | 23 MB | 195 MB |
| Requires iOS | **15.6** | 18.0 |
| Devices | iPad | **iPhone, iPad** |
| Age rating | 4+ | 4+ |
| Developer | [Carmel Software Corporation](https://appshunter.io/developer/317970398) | [Testo SE & Co. KGaA](https://appshunter.io/developer/966489178) |

## What reviewers say

### HVAC ResLoad

[App page](https://appshunter.io/ios/app/hvac-resload-j/id567612484)

Perform ACCA Manual J8 load calculations for residential and small commercial buildings. Generate and email PDF reports for clients and building officials. Includes extensive weather and construction data for detailed analysis.

**Highlights:** ACCA Manual J8 load calculations, Field-based cooling and heating load calculations, Emailable PDF reports, Unlimited projects and templates, Global weather data, Extensive construction data, Room-by-room analysis

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

**In-app purchases:** none


### testo Smart

[App page](https://appshunter.io/ios/app/testo-smart/id1482139629)

This app supports measurements for refrigeration, HVAC, and heating systems. It also aids in food safety, frying oil quality, and indoor climate monitoring. Quickly interpret data, create digital reports with photos, and send them via email.

**Highlights:** All-in-one system measurements, Graphical display of measured values, Digital PDF/CSV measurement reports, Email report sharing, Leak test analysis, Automatic refrigerant charging, Indoor air quality monitoring

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

**In-app purchases (5)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Multi-site measurement | $6.99 | per month |
| Air balancing | $9.99 | per month |
| Multi-site measurement | $69.90 | per year |
| Air balancing | $99.90 | per year |
| Logging digital manifold | $44.99 | one-time |

**What reviewers like**

- 👍 Good app with some features
- 🚀 Great product
- 🚀 Useful app for measurements

**What reviewers complain about**

- 🐛 App won't connect
- 🐛 Connectivity issues
- 🐛 Unreliable connection
- 🐛 Forced updates
- 🐛 Laggy and unresponsive UI

**Reported bugs**

- App won't connect to devices
- Compatibility issues with newer iOS versions
- Frequent crashes and freezes
- Inability to save favorite refrigerants
- Measurement data not displaying properly

**Requested features**

- Add option to toggle Bluetooth discovery
- Improve Bluetooth range
- Add ability to customize colors and graphs
- Improve data export functionality
- Add option to name sensors


## Frequently asked questions

### Is HVAC ResLoad free?

HVAC ResLoad costs $199.99, with no in-app purchases.

### Is testo Smart free?

testo Smart is free to download, with in-app purchases available.

### Which has better reviews, HVAC ResLoad or testo Smart?

HVAC ResLoad is rated higher. HVAC ResLoad averages 3.4 out of 5 from 8 ratings, while testo Smart averages 2.7 from 170 ratings.

### Do HVAC ResLoad or testo Smart have ads?

Neither HVAC ResLoad nor testo Smart shows ads.

### Which is updated more often, HVAC ResLoad or testo Smart?

HVAC ResLoad ships an update every 4 months, and testo Smart every 2 months. Most recently, HVAC ResLoad was updated on October 27, 2026 and testo Smart on October 25, 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.*