# testo Smart vs Vertical Shaft Alignment

The clearest difference is rating: Vertical Shaft Alignment at 5.0 against testo Smart's 2.7. Vertical Shaft Alignment also leads on in-app purchases (none vs 5) and iOS requirement (13.0 vs 18.0). testo Smart's advantage is ratings volume (167 vs 1) and update cadence (every 2 months vs every 6 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. Vertical Shaft Alignment asks for nothing beyond the download.

Vertical Shaft Alignment 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 1, so its average is the more settled of the two.

testo Smart ships an update every 2 months, Vertical Shaft Alignment every 6 months. The most recent releases landed on September 20, 2026 and July 19, 2026 respectively.

## The numbers

| Metric | testo Smart | Vertical Shaft Alignment |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [2.7 (167 ratings)](https://appshunter.io/ios/app/testo-smart/id1482139629/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/vertical-shaft-alignment/id1499478849/reviews)** |
| Number of ratings | **167** | 1 |
| Positive reviews | 16.3% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 2 months** | Every 6 months |
| Monetization | Free with in-app purchases | **Free** |
| Size | 195 MB | 94 MB |
| Requires iOS | 18.0 | **13.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Testo SE & Co. KGaA](https://appshunter.io/developer/966489178) | [ACOEM Group](https://appshunter.io/developer/1495816959) |

## 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


### Vertical Shaft Alignment

[App page](https://appshunter.io/ios/app/vertical-shaft-alignment/id1499478849)

This app guides users through the vertical shaft alignment process for motor and pump applications using specific Bluetooth-connected sensors. It facilitates measurement and alignment, and allows for instant PDF report generation on-site.

**Highlights:** Bluetooth sensor connectivity, Guided measurement and alignment process, Icon-based adaptive user interface, Instant PDF report generation, Works with RT-300/AT-200 sensors

**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 Vertical Shaft Alignment free?

Vertical Shaft Alignment is free to download, with no in-app purchases.

### Which has better reviews, testo Smart or Vertical Shaft Alignment?

Vertical Shaft Alignment is rated higher. testo Smart averages 2.7 out of 5 from 167 ratings, while Vertical Shaft Alignment averages 5.0 from 1 ratings.

### Do testo Smart or Vertical Shaft Alignment have ads?

Neither testo Smart nor Vertical Shaft Alignment shows ads.

### Which is updated more often, testo Smart or Vertical Shaft Alignment?

testo Smart ships an update every 2 months, and Vertical Shaft Alignment every 6 months. Most recently, testo Smart was updated on September 20, 2026 and Vertical Shaft Alignment on July 19, 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.*