# Vibration Meter, seismograph vs iScan

The clearest difference is in-app purchases: iScan at none against Vibration Meter, seismograph's 1. iScan also leads on update cadence (every 6 days vs every 7 months). Vibration Meter, seismograph's advantage is ads (none vs shown) and iOS requirement (12.0 vs 18.0). On price and device support there is nothing between them.

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

Vibration Meter, seismograph ships an update every 7 months, iScan every 6 days. The most recent releases landed on October 29, 2026 and October 18, 2026 respectively.

## The numbers

| Metric | Vibration Meter, seismograph | iScan |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.7 (729 ratings)](https://appshunter.io/ios/app/vibration-meter-seismograph/id1137580201/reviews)** | — |
| Number of ratings | **729** | — |
| Positive reviews | 41.7% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | **No** | Yes |
| Update frequency | Every 7 months | **Every 6 days** |
| Monetization | Free with in-app purchases | — |
| Size | 18 MB | 8 MB |
| Requires iOS | **12.0** | 18.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [ExaMobile S.A.](https://appshunter.io/developer/506014841) | [kenta isomi](https://appshunter.io/developer/1341688120) |

## 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 |


### iScan

[App page](https://appshunter.io/ios/app/iscan-d/id6808693111)

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

**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 iScan free?

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

### Do Vibration Meter, seismograph or iScan have ads?

iScan shows ads; Vibration Meter, seismograph does not.

### Which is updated more often, Vibration Meter, seismograph or iScan?

Vibration Meter, seismograph ships an update every 7 months, and iScan every 6 days. Most recently, Vibration Meter, seismograph was updated on October 29, 2026 and iScan on October 18, 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.*