# Vibration meter vs WaterTool

The clearest difference is ads: WaterTool at none against Vibration meter's shown. WaterTool also leads on iOS requirement (11.0 vs 16.0). Vibration meter's advantage is update cadence (monthly vs every 15 months). On price, 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 WaterTool sells 4 in-app purchases, starting at $0.49 per month. Whichever you choose, the download price is not the number that matters.

Vibration meter ships an update monthly, WaterTool every 15 months. The most recent releases landed on October 19, 2026 and October 6, 2026 respectively.

## The numbers

| Metric | Vibration meter | WaterTool |
| --- | --- | --- |
| 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 15 months |
| Monetization | Free with in-app purchases | — |
| Size | 51 MB | 56 MB |
| Requires iOS | 16.0 | **11.0** |
| Devices | iPhone, iPad, Apple Watch | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [MYSTIC MOBILE APPS LLC](https://appshunter.io/developer/1481942662) | [Chai Kunnasit](https://appshunter.io/developer/666607479) |

## 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 |


### WaterTool

[App page](https://appshunter.io/ios/app/watertool/id6455259867)

**Features:** macOS Compatibility

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium-1 Month | $0.49 | per month |
| Premium-3Months | $0.99 | per 3 months |
| Premium6Months | $1.99 | per 6 months |
| Premium-1Year | $2.99 | per year |


## Frequently asked questions

### Is Vibration meter free?

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

### Is WaterTool free?

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

### Do Vibration meter or WaterTool have ads?

Vibration meter shows ads; WaterTool does not.

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

Vibration meter ships an update monthly, and WaterTool every 15 months. Most recently, Vibration meter was updated on October 19, 2026 and WaterTool on October 6, 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.*