# Vibration meter vs TXTdiff

The clearest difference is ads: TXTdiff at none against Vibration meter's shown. On price, update cadence, in-app purchases and device support there is nothing between them.

Both are free to download. Vibration meter sells 2 in-app purchases, starting at $0.99 per month and TXTdiff sells 2 in-app purchases, starting at $14.99 per 6 months. Whichever you choose, the download price is not the number that matters.

Vibration meter ships an update monthly, TXTdiff every 2 months. The most recent releases landed on September 22, 2026 and September 20, 2026 respectively.

## The numbers

| Metric | Vibration meter | TXTdiff |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.4 (14 ratings)](https://appshunter.io/ios/app/vibration-meter-seismometer/id1373632255/reviews)** | — |
| Number of ratings | **14** | — |
| Positive reviews | 33.3% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | Yes | **No** |
| Update frequency | **Monthly** | Every 2 months |
| Monetization | Free with in-app purchases | — |
| Size | 51 MB | 56 MB |
| Requires iOS | **16.0** | 17.0 |
| Devices | **iPhone, iPad, Apple Watch** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [MYSTIC MOBILE APPS LLC](https://appshunter.io/developer/1481942662) | [宇 鄢](https://appshunter.io/developer/1895890367) |

## What reviewers say

### Vibration meter

[App page](https://appshunter.io/ios/app/vibration-meter-seismometer/id1373632255)

Measure the strength of vibrations, tremors, and earthquakes using your phone's built-in seismograph. Visualize seismic movements on graphs, receive real-time Mercalli scale readings, and get instant alerts for seismic shocks. Data can be saved and shared for analysis.

**Highlights:** High-accuracy seismometer, Seismic wave detection, Detailed graphical analysis, Real-time Mercalli scale readings, Instant alerts for seismic shocks, Effortless data autosave, Apple Watch compatibility

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly Vibration meter+ | $0.99 | per month |
| Annual Vibration meter+ | $5.99 | per year |


### TXTdiff

[App page](https://appshunter.io/ios/app/txtdiff/id6764725456)

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Semi-Annual with 7-Day Free Trial | $14.99 | per 6 months |
| Annual with 15-Day Free Trial | $19.99 | per year |


## Frequently asked questions

### Is Vibration meter free?

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

### Is TXTdiff free?

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

### Do Vibration meter or TXTdiff have ads?

Vibration meter shows ads; TXTdiff does not.

### Which is updated more often, Vibration meter or TXTdiff?

Vibration meter ships an update monthly, and TXTdiff every 2 months. Most recently, Vibration meter was updated on September 22, 2026 and TXTdiff on September 20, 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.*