# Scale Link vs testo Smart

The clearest difference is rating: testo Smart at 2.7 against Scale Link's 2.1. testo Smart also leads on review sentiment (16% vs 0%) and ratings volume (167 vs 21). Scale Link's advantage is in-app purchases (none vs 5) and update cadence (monthly vs every 2 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. Scale Link asks for nothing beyond the download.

testo Smart holds the better App Store score, 2.7 against 2.1. That said, the two scores are not equally well evidenced: testo Smart has 167 ratings behind it against 21, so its average is the more settled of the two. Written reviews point the same way: 0% of Scale Link's written reviews are positive against 16% of testo Smart's.

Scale Link ships an update monthly, testo Smart every 2 months. The most recent releases landed on September 16, 2026 and October 2, 2026 respectively.

## The numbers

| Metric | Scale Link | testo Smart |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [2.1 (21 ratings)](https://appshunter.io/ios/app/scale-link/id1027059407/reviews) | **[2.7 (167 ratings)](https://appshunter.io/ios/app/testo-smart/id1482139629/reviews)** |
| Number of ratings | 21 | **167** |
| Positive reviews | 0.0% of reviews | **16.3% of reviews** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Monthly** | Every 2 months |
| Monetization | **Free** | Free with in-app purchases |
| Size | 22 MB | 195 MB |
| Requires iOS | **8.0** | 18.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [CPS Products, Inc.](https://appshunter.io/developer/945771072) | [Testo SE & Co. KGaA](https://appshunter.io/developer/966489178) |

## What reviewers say

### Scale Link

[App page](https://appshunter.io/ios/app/scale-link/id1027059407)

This application allows remote communication and control of wireless scales for servicing air-conditioning and refrigeration equipment. It offers comprehensive system measurement views, graphical depictions of test functions, and data logging capabilities.

**Highlights:** Remote scale communication, Control of select scale functions, View system measurements, Graphical test function depictions, Data logging

**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 Scale Link free?

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

### Is testo Smart free?

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

### Which has better reviews, Scale Link or testo Smart?

testo Smart is rated higher. Scale Link averages 2.1 out of 5 from 21 ratings, while testo Smart averages 2.7 from 167 ratings.

### Do Scale Link or testo Smart have ads?

Neither Scale Link nor testo Smart shows ads.

### Which is updated more often, Scale Link or testo Smart?

Scale Link ships an update monthly, and testo Smart every 2 months. Most recently, Scale Link was updated on September 16, 2026 and testo Smart on October 2, 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.*