# Vibration Meter, seismograph vs SKF Machine train alignment

The clearest difference is in-app purchases: SKF Machine train alignment at none against Vibration Meter, seismograph's 1. SKF Machine train alignment also leads on update cadence (every 3 months vs every 7 months). Vibration Meter, seismograph's advantage is iOS requirement (12.0 vs 15.0). On price, ads and device support there is nothing between them.

Both are free to download. Vibration Meter, seismograph sells 1 one-off in-app purchase. SKF Machine train alignment asks for nothing beyond the download.

Vibration Meter, seismograph ships an update every 7 months, SKF Machine train alignment every 3 months. The most recent releases landed on September 23, 2026 and September 17, 2026 respectively.

## The numbers

| Metric | Vibration Meter, seismograph | SKF Machine train alignment |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.7 (717 ratings)](https://appshunter.io/ios/app/vibration-meter-seismograph/id1137580201/reviews)** | — |
| Number of ratings | **717** | — |
| Positive reviews | 41.7% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 7 months | **Every 3 months** |
| Monetization | Free with in-app purchases | — |
| Size | 18 MB | 69 MB |
| Requires iOS | **12.0** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [ExaMobile S.A.](https://appshunter.io/developer/506014841) | [SKF](https://appshunter.io/developer/472922971) |

## What reviewers say

### Vibration Meter, seismograph

[App page](https://appshunter.io/ios/app/vibration-meter-seismograph/id1137580201)

This application uses your phone's accelerometer to measure and record vibrations from various sources, including earthquakes and everyday objects. It displays ground motion on a graph and uses an instrumental intensity scale for analysis. You can also monitor and share your measurement results.

**Highlights:** Measures vibration strength, Detects seismic waves, Uses accelerometer for analysis, Displays ground motion graph, Utilizes instrumental intensity scale, Monitors and shares results

**Features:** Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remove ads | $1.99 | one-time |


### SKF Machine train alignment

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

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Vibration Meter, seismograph free?

Vibration Meter, seismograph is free to download, with in-app purchases available.

### Is SKF Machine train alignment free?

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

### Do Vibration Meter, seismograph or SKF Machine train alignment have ads?

Neither Vibration Meter, seismograph nor SKF Machine train alignment shows ads.

### Which is updated more often, Vibration Meter, seismograph or SKF Machine train alignment?

Vibration Meter, seismograph ships an update every 7 months, and SKF Machine train alignment every 3 months. Most recently, Vibration Meter, seismograph was updated on September 23, 2026 and SKF Machine train alignment on September 17, 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.*