# testo Combustion App vs UEi Link

The clearest difference is iOS requirement: testo Combustion App at 9.3 against UEi Link's 13.0. On price, update cadence, ads and in-app purchases there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

testo Combustion App ships an update every 7 months, UEi Link every 4 months. The most recent releases landed on September 20, 2026 and July 22, 2026 respectively.

## The numbers

| Metric | testo Combustion App | UEi Link |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[1.4 (10 ratings)](https://appshunter.io/ios/app/testo-combustion-app/id992414788/reviews)** | — |
| Number of ratings | **10** | — |
| Positive reviews | 12.8% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 7 months | **Every 4 months** |
| Monetization | Free | — |
| Size | 62 MB | 38 MB |
| Requires iOS | **9.3** | 13.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Testo SE & Co. KGaA](https://appshunter.io/developer/966489178) | [Kane Asia Inc.](https://appshunter.io/developer/1542732944) |

## What reviewers say

### testo Combustion App

[App page](https://appshunter.io/ios/app/testo-combustion-app/id992414788)

Control your testo 330 flue gas analyzer remotely from your smartphone or tablet. Create and send professional PDF reports with photos and your logo directly from the field, ensuring fast and efficient documentation.

**Highlights:** Remote start/stop of measuring instrument, Intuitive touchscreen menu, Graphical trend view, PDF report creation, Export measurement values to CSV, Customizable reports with logo, Bluetooth connectivity (20m range)

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

**In-app purchases:** none


### UEi Link

[App page](https://appshunter.io/ios/app/uei-link/id6544792992)

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

**In-app purchases:** none


## Frequently asked questions

### Is testo Combustion App free?

testo Combustion App is free to download, with no in-app purchases.

### Is UEi Link free?

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

### Do testo Combustion App or UEi Link have ads?

Neither testo Combustion App nor UEi Link shows ads.

### Which is updated more often, testo Combustion App or UEi Link?

testo Combustion App ships an update every 7 months, and UEi Link every 4 months. Most recently, testo Combustion App was updated on September 20, 2026 and UEi Link on July 22, 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.*