# SKF Vertical shaft alignment vs i6Yun

The clearest difference is update cadence: i6Yun at every 3 weeks against SKF Vertical shaft alignment's every 3 months. i6Yun also leads on iOS requirement (13.0 vs 16.6). 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.

SKF Vertical shaft alignment ships an update every 3 months, i6Yun every 3 weeks. Both last shipped on November 2, 2026.

## The numbers

| Metric | SKF Vertical shaft alignment | i6Yun |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[1.0 (1 ratings)](https://appshunter.io/ios/app/i6yun/id1225082477/reviews)** |
| Number of ratings | — | **1** |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 months | **Every 3 weeks** |
| Monetization | Free | Free |
| Size | 68 MB | 87 MB |
| Requires iOS | 16.6 | **13.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [SKF](https://appshunter.io/developer/472922971) | [Dongguan Tuancheng Automation Equipment Co., Ltd.](https://appshunter.io/developer/1181389850) |

## What reviewers say

### SKF Vertical shaft alignment

[App page](https://appshunter.io/ios/app/skf-vertical-shaft-alignment/id1149886803)

This utility app, when paired with specific hardware, enables intuitive and accurate vertical shaft alignments for rotating machines. It guides users through measurements, provides corrective values, and generates detailed reports. A demonstration mode is available for users without the hardware.

**Highlights:** Intuitive vertical shaft alignment, Quick three-point measurement guidance, Support for various bolt configurations, Demonstration mode for trial, Automatic alignment report generation, Explanatory videos and 3D animations, Machine library with QR code scanner

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

**In-app purchases:** none


### i6Yun

[App page](https://appshunter.io/ios/app/i6yun/id1225082477)

Remotely monitor and manage generator sets from anywhere in the world. View real-time operating data, engine and generator details, and receive maintenance reminders. Includes fault analysis and location tracking.

**Highlights:** Real-time monitoring, Dynamic data display, Engine and generator details, Failure analysis with black box technology, Health reports, History data charts, Unit location tracking, Maintenance reminders

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

**In-app purchases:** none


## Frequently asked questions

### Is SKF Vertical shaft alignment free?

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

### Is i6Yun free?

i6Yun is free to download, with no in-app purchases.

### Do SKF Vertical shaft alignment or i6Yun have ads?

Neither SKF Vertical shaft alignment nor i6Yun shows ads.

### Which is updated more often, SKF Vertical shaft alignment or i6Yun?

SKF Vertical shaft alignment ships an update every 3 months, and i6Yun every 3 weeks. Most recently, SKF Vertical shaft alignment was updated on November 2, 2026 and i6Yun on November 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.*