# testo Smart vs Tangelo Field Service

The clearest difference is in-app purchases: Tangelo Field Service at none against testo Smart's 5. Tangelo Field Service also leads on iOS requirement (15.1 vs 18.0). testo Smart's advantage is update cadence (every 2 months vs every 25 months). 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. Tangelo Field Service asks for nothing beyond the download.

testo Smart ships an update every 2 months, Tangelo Field Service every 25 months. The most recent releases landed on November 11, 2026 and November 3, 2026 respectively.

## The numbers

| Metric | testo Smart | Tangelo Field Service |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[2.7 (170 ratings)](https://appshunter.io/ios/app/testo-smart/id1482139629/reviews)** | — |
| Number of ratings | **170** | — |
| Positive reviews | 16.3% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 2 months** | Every 25 months |
| Monetization | Free with in-app purchases | — |
| Size | 195 MB | 51 MB |
| Requires iOS | 18.0 | **15.1** |
| Devices | iPhone, iPad | iPhone, iPod |
| Age rating | 4+ | 17+ |
| Developer | [Testo SE & Co. KGaA](https://appshunter.io/developer/966489178) | [tangelo ai](https://appshunter.io/developer/1522926894) |

## 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


### Tangelo Field Service

[App page](https://appshunter.io/ios/app/tangelo-field-service/id1623131315)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is testo Smart free?

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

### Is Tangelo Field Service free?

Tangelo Field Service is free to download, with no in-app purchases.

### Do testo Smart or Tangelo Field Service have ads?

Neither testo Smart nor Tangelo Field Service shows ads.

### Which is updated more often, testo Smart or Tangelo Field Service?

testo Smart ships an update every 2 months, and Tangelo Field Service every 25 months. Most recently, testo Smart was updated on November 11, 2026 and Tangelo Field Service on November 3, 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.*