# SKF Machine train alignment vs SonaVu InSights

The clearest difference is update cadence: SonaVu InSights at fortnightly against SKF Machine train alignment's every 3 months. On price, ads, in-app purchases and device support there is nothing between them.

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

SKF Machine train alignment ships an update every 3 months, SonaVu InSights fortnightly. Both last shipped on October 28, 2026.

## The numbers

| Metric | SKF Machine train alignment | SonaVu InSights |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 months | **Fortnightly** |
| Size | 69 MB | 55 MB |
| Requires iOS | **15.0** | 15.6 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [SKF](https://appshunter.io/developer/472922971) | [SM Instruments Inc.](https://appshunter.io/developer/1802574173) |

## What reviewers say

### SKF Machine train alignment

[App page](https://appshunter.io/ios/app/skf-machine-train-alignment/id1149906003)

**Features:** macOS Compatibility

**In-app purchases:** none


### SonaVu InSights

[App page](https://appshunter.io/ios/app/sonavu-insights/id6743147172)

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

**In-app purchases:** none


## Frequently asked questions

### Is SKF Machine train alignment free?

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

### Is SonaVu InSights free?

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

### Do SKF Machine train alignment or SonaVu InSights have ads?

Neither SKF Machine train alignment nor SonaVu InSights shows ads.

### Which is updated more often, SKF Machine train alignment or SonaVu InSights?

SKF Machine train alignment ships an update every 3 months, and SonaVu InSights fortnightly. Most recently, SKF Machine train alignment was updated on October 28, 2026 and SonaVu InSights on October 28, 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.*