# Vibration meter vs Alone App

The clearest difference is rating: Vibration meter at 4.4 against Alone App's 3.0. Vibration meter also leads on review sentiment (33% vs 0%) and ratings volume (14 vs 1). Alone App's advantage is in-app purchases (none vs 2) and ads (none vs shown). On price, update cadence, device support and iOS requirement there is nothing between them.

Both are free to download. Vibration meter sells 2 in-app purchases, starting at $0.99 per month. Alone App asks for nothing beyond the download.

Vibration meter holds the better App Store score, 4.4 against 3.0. That said, the two scores are not equally well evidenced: Vibration meter has 14 ratings behind it against 1, so its average is the more settled of the two. Written reviews point the same way: 33% of Vibration meter's written reviews are positive against 0% of Alone App's.

Both ship on a similar rhythm, roughly monthly. Both last shipped on October 9, 2026.

## The numbers

| Metric | Vibration meter | Alone App |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.4 (14 ratings)](https://appshunter.io/ios/app/vibration-meter-seismometer/id1373632255/reviews)** | [3.0 (1 ratings)](https://appshunter.io/ios/app/alone-app/id6752347363/reviews) |
| Number of ratings | **14** | 1 |
| Positive reviews | **33.3% of reviews** | 0.0% of reviews |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | Monthly | Monthly |
| Monetization | Free with in-app purchases | **Free** |
| Size | 51 MB | 37 MB |
| Requires iOS | 16.0 | **15.1** |
| Devices | **iPhone, iPad, Apple Watch** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [MYSTIC MOBILE APPS LLC](https://appshunter.io/developer/1481942662) | [Alone B.V.](https://appshunter.io/developer/1838976869) |

## 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 |


### Alone App

[App page](https://appshunter.io/ios/app/alone-app/id6752347363)

This app provides smart check-ins and instant alerts to emergency contacts, designed to protect the well-being of individuals living alone. It offers peace of mind through simple, reliable, and customizable safety features.

**Highlights:** Smart check-ins, Instant alerts to emergency contacts, Customizable check-in frequency, Privacy-first design, Simple and reliable operation

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

**In-app purchases:** none


## Frequently asked questions

### Is Vibration meter free?

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

### Is Alone App free?

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

### Which has better reviews, Vibration meter or Alone App?

Vibration meter is rated higher. Vibration meter averages 4.4 out of 5 from 14 ratings, while Alone App averages 3.0 from 1 ratings.

### Do Vibration meter or Alone App have ads?

Vibration meter shows ads; Alone App does not.

### Which is updated more often, Vibration meter or Alone App?

Vibration meter ships an update monthly, and Alone App monthly. Most recently, Vibration meter was updated on October 9, 2026 and Alone App on October 9, 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.*