# IR vs Vibration Meter, seismograph

The clearest difference is in-app purchases: IR at none against Vibration Meter, seismograph's 1. IR also leads on iOS requirement (9.0 vs 12.0). On price, update cadence, ads and device support there is nothing between them.

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

Both ship on a similar rhythm, roughly every 7 months. The most recent releases landed on September 27, 2026 and September 28, 2026 respectively.

## The numbers

| Metric | IR | Vibration Meter, seismograph |
| --- | --- | --- |
| 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 | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 7 months | Every 7 months |
| Monetization | — | Free with in-app purchases |
| Size | 47 MB | 18 MB |
| Requires iOS | **9.0** | 12.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [凯兴 莫](https://appshunter.io/developer/1120890137) | [ExaMobile S.A.](https://appshunter.io/developer/506014841) |

## What reviewers say

### IR

[App page](https://appshunter.io/ios/app/ir-tracker/id1120890138)

**Features:** macOS Compatibility

**In-app purchases:** none


### 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 |


## Frequently asked questions

### Is IR free?

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

### Is Vibration Meter, seismograph free?

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

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

Neither IR nor Vibration Meter, seismograph shows ads.

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

IR ships an update every 7 months, and Vibration Meter, seismograph every 7 months. Most recently, IR was updated on September 27, 2026 and Vibration Meter, seismograph on September 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.*