# Seismometer ∞ vs VibraScope

The clearest difference is in-app purchases: Seismometer ∞ at none against VibraScope's 1. VibraScope's advantage is device support (3 vs 1) and iOS requirement (13.0 vs 17.0). On price, update cadence and ads there is nothing between them.

Both are free to download. VibraScope sells 1 one-off in-app purchase. Seismometer ∞ asks for nothing beyond the download.

Seismometer ∞ ships an update every 2 weeks, VibraScope fortnightly. The most recent releases landed on October 14, 2026 and October 15, 2026 respectively.

## The numbers

| Metric | Seismometer ∞ | VibraScope |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | Yes | Yes |
| Update frequency | **Every 2 weeks** | Fortnightly |
| Size | 16 MB | 90 MB |
| Requires iOS | 17.0 | **13.0** |
| Devices | iPhone | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [辰巳家有限公司](https://appshunter.io/developer/1781943256) | [SEONYONG LEE](https://appshunter.io/developer/6775892940) |

## What reviewers say

### Seismometer ∞

[App page](https://appshunter.io/ios/app/seismometer/id6761700650)

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

**In-app purchases:** none


### VibraScope

[App page](https://appshunter.io/ios/app/vibrascope-vibration-meter/id6792025203)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remove Ads | $4.99 | one-time |


## Frequently asked questions

### Is Seismometer ∞ free?

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

### Is VibraScope free?

VibraScope is free to download, with in-app purchases available.

### Do Seismometer ∞ or VibraScope have ads?

Both Seismometer ∞ and VibraScope show ads.

### Which is updated more often, Seismometer ∞ or VibraScope?

Seismometer ∞ ships an update every 2 weeks, and VibraScope fortnightly. Most recently, Seismometer ∞ was updated on October 14, 2026 and VibraScope on October 15, 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.*