# SKF Shaft alignment vs SmartTank Watch

The clearest difference is rating: SmartTank Watch at 5.0 against SKF Shaft alignment's 3.7. SKF Shaft alignment's advantage is update cadence (every 3 months vs every 9 months) and ratings volume (10 vs 1). On price, ads, in-app purchases and monetization model there is nothing between them.

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

SmartTank Watch holds the better App Store score, 5.0 against 3.7. That said, the two scores are not equally well evidenced: SKF Shaft alignment has 10 ratings behind it against 1, so its average is the more settled of the two.

SKF Shaft alignment ships an update every 3 months, SmartTank Watch every 9 months. The most recent releases landed on November 6, 2026 and November 4, 2026 respectively.

## The numbers

| Metric | SKF Shaft alignment | SmartTank Watch |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [3.7 (10 ratings)](https://appshunter.io/ios/app/skf-shaft-alignment/id990162436/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/smarttank-watch/id6477401293/reviews)** |
| Number of ratings | **10** | 1 |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 3 months** | Every 9 months |
| Monetization | Free | Free |
| Size | 72 MB | 45 MB |
| Requires iOS | 16.0 | **15.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [SKF](https://appshunter.io/developer/472922971) | [TankLink Corporation](https://appshunter.io/developer/1084784645) |

## What reviewers say

### SKF Shaft alignment

[App page](https://appshunter.io/ios/app/skf-shaft-alignment/id990162436)

This utility app, when paired with specific hardware, enables precise and intuitive shaft alignment for rotating machinery. It offers a demonstration mode for experiencing the full process without the hardware and generates automatic, shareable reports.

**Highlights:** Intuitive shaft alignment with hardware, Flexible three-position measurement, Demonstration mode for full experience, Automatic, customizable alignment reports, Explanatory setup and measurement videos, 3D animations for guidance, Machine library with QR code scanner

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

**In-app purchases:** none


### SmartTank Watch

[App page](https://appshunter.io/ios/app/smarttank-watch/id6477401293)

Monitor tank levels, temperature, and location remotely. Receive real-time notifications and alerts to prevent run-outs and optimize delivery schedules. Streamline operations and improve inventory management for petroleum and chemical industries.

**Highlights:** Monitor tank levels, temperature, and location, Real-time notifications and alerts, Prevent product run-outs, Optimize delivery scheduling and routes, Access data and reports easily, Wireless monitoring

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

**In-app purchases:** none


## Frequently asked questions

### Is SKF Shaft alignment free?

SKF Shaft alignment is free to download, with no in-app purchases.

### Is SmartTank Watch free?

SmartTank Watch is free to download, with no in-app purchases.

### Which has better reviews, SKF Shaft alignment or SmartTank Watch?

SmartTank Watch is rated higher. SKF Shaft alignment averages 3.7 out of 5 from 10 ratings, while SmartTank Watch averages 5.0 from 1 ratings.

### Do SKF Shaft alignment or SmartTank Watch have ads?

Neither SKF Shaft alignment nor SmartTank Watch shows ads.

### Which is updated more often, SKF Shaft alignment or SmartTank Watch?

SKF Shaft alignment ships an update every 3 months, and SmartTank Watch every 9 months. Most recently, SKF Shaft alignment was updated on November 6, 2026 and SmartTank Watch on November 4, 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.*