# Seismometer ∞ vs Tremor Check

The clearest difference is ads: Tremor Check at none against Seismometer ∞'s shown. On price, in-app purchases, device support and iOS requirement there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

## The numbers

| Metric | Seismometer ∞ | Tremor Check |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | Yes | **No** |
| Update frequency | Every 2 weeks | — |
| Size | 16 MB | 1 MB |
| Requires iOS | 17.0 | **16.0** |
| Devices | iPhone | **iPhone, Apple Watch** |
| Age rating | 4+ | 4+ |
| Developer | [辰巳家有限公司](https://appshunter.io/developer/1781943256) | [Alejandro Odreman](https://appshunter.io/developer/6789374315) |

## What reviewers say

### Seismometer ∞

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

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

**In-app purchases:** none


### Tremor Check

[App page](https://appshunter.io/ios/app/tremor-check-is-it-shaking/id6789374313)

**Features:** macOS Compatibility, Apple Watch app, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Seismometer ∞ free?

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

### Is Tremor Check free?

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

### Do Seismometer ∞ or Tremor Check have ads?

Seismometer ∞ shows ads; Tremor Check does not.

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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.*