# Vibration Meter, seismograph vs IntervAI

The clearest difference is price: Vibration Meter, seismograph at Free against IntervAI's $9.99. Vibration Meter, seismograph also leads on iOS requirement (12.0 vs 15.0). IntervAI's advantage is in-app purchases (none vs 1) and update cadence (every 3 weeks vs every 7 months). On ads and device support there is nothing between them.

Vibration Meter, seismograph is free to download; IntervAI costs $9.99 up front. Vibration Meter, seismograph sells 1 one-off in-app purchase. IntervAI asks for nothing beyond the download.

Vibration Meter, seismograph ships an update every 7 months, IntervAI every 3 weeks. The most recent releases landed on October 18, 2026 and October 5, 2026 respectively.

## The numbers

| Metric | Vibration Meter, seismograph | IntervAI |
| --- | --- | --- |
| Price | **Free** | $9.99 |
| 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 weeks** |
| Monetization | Free with in-app purchases | — |
| Size | 18 MB | 3 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) | [Yu Huang](https://appshunter.io/developer/1873873379) |

## 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 |


### IntervAI

[App page](https://appshunter.io/ios/app/intervai-interview-copilot/id6758596978)

**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 IntervAI free?

IntervAI costs $9.99, with no in-app purchases.

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

Neither Vibration Meter, seismograph nor IntervAI shows ads.

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

Vibration Meter, seismograph ships an update every 7 months, and IntervAI every 3 weeks. Most recently, Vibration Meter, seismograph was updated on October 18, 2026 and IntervAI on October 5, 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.*