# testo Smart vs DUX Experts

The clearest difference is review sentiment: DUX Experts at 100% against testo Smart's 16%. DUX Experts also leads on rating (5.0 vs 2.7) and in-app purchases (none vs 5). testo Smart's advantage is ratings volume (167 vs 8). On price, ads and device support there is nothing between them.

Both are free to download. testo Smart sells 5 in-app purchases, starting at $6.99 per month. DUX Experts asks for nothing beyond the download.

DUX Experts holds the better App Store score, 5.0 against 2.7. That said, the two scores are not equally well evidenced: testo Smart has 167 ratings behind it against 8, so its average is the more settled of the two. Written reviews point the same way: 16% of testo Smart's written reviews are positive against 100% of DUX Experts's.

testo Smart ships an update every 2 months, DUX Experts monthly. The most recent releases landed on October 17, 2026 and October 14, 2026 respectively.

## The numbers

| Metric | testo Smart | DUX Experts |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [2.7 (167 ratings)](https://appshunter.io/ios/app/testo-smart/id1482139629/reviews) | **[5.0 (8 ratings)](https://appshunter.io/ios/app/dux-experts/id1642114424/reviews)** |
| Number of ratings | **167** | 8 |
| Positive reviews | 16.3% of reviews | **100.0% of reviews** |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 2 months | **Monthly** |
| Monetization | Free with in-app purchases | **Free** |
| Size | 195 MB | 44 MB |
| Requires iOS | 18.0 | **16.0** |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Testo SE & Co. KGaA](https://appshunter.io/developer/966489178) | [DUX Experts, Inc.](https://appshunter.io/developer/1680898543) |

## What reviewers say

### 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


### DUX Experts

[App page](https://appshunter.io/ios/app/dux-experts/id1642114424)

Streamline your inspection process with this app, offering an intuitive interface for guided, remote inspections. Capture high-resolution photos with annotation tools and generate professional reports, all securely stored in the cloud.

**Highlights:** Intuitive user interface, Real-time collaboration, Guided step-by-step inspections, High-resolution photo capture, Annotation tools, Customizable report generation, Cloud storage and security

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

**In-app purchases:** none


## Frequently asked questions

### Is testo Smart free?

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

### Is DUX Experts free?

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

### Which has better reviews, testo Smart or DUX Experts?

DUX Experts is rated higher. testo Smart averages 2.7 out of 5 from 167 ratings, while DUX Experts averages 5.0 from 8 ratings.

### Do testo Smart or DUX Experts have ads?

Neither testo Smart nor DUX Experts shows ads.

### Which is updated more often, testo Smart or DUX Experts?

testo Smart ships an update every 2 months, and DUX Experts monthly. Most recently, testo Smart was updated on October 17, 2026 and DUX Experts on October 14, 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.*