# Smart Vibration Meter・Detector vs Magnetic Field Calc +

The clearest difference is price: Smart Vibration Meter・Detector at Free against Magnetic Field Calc +'s $2.99. Smart Vibration Meter・Detector also leads on update cadence (every 8 months vs every 27 months) and ratings volume (27 vs 1). Magnetic Field Calc +'s advantage is in-app purchases (none vs 17) and ads (none vs shown). On rating and device support there is nothing between them.

Smart Vibration Meter・Detector is free to download; Magnetic Field Calc + costs $2.99 up front. Smart Vibration Meter・Detector sells 17 in-app purchases, starting at $0.99 per 7 days. Magnetic Field Calc + asks for nothing beyond the download.

On the App Store both sit at effectively the same score — 4.1 for Smart Vibration Meter・Detector against 4.0 for Magnetic Field Calc +. That said, the two scores are not equally well evidenced: Smart Vibration Meter・Detector has 27 ratings behind it against 1, so its average is the more settled of the two.

Smart Vibration Meter・Detector ships an update every 8 months, Magnetic Field Calc + every 27 months. The most recent releases landed on October 20, 2026 and October 11, 2026 respectively.

## The numbers

| Metric | Smart Vibration Meter・Detector | Magnetic Field Calc + |
| --- | --- | --- |
| Price | **Free** | $2.99 |
| Rating | **[4.1 (27 ratings)](https://appshunter.io/ios/app/smart-vibration-meterdetector/id1121590218/reviews)** | [4.0 (1 ratings)](https://appshunter.io/ios/app/magnetic-field-calc-plus/id1423005752/reviews) |
| Number of ratings | **27** | 1 |
| Positive reviews | 60.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | **Every 8 months** | Every 27 months |
| Monetization | **Free with in-app purchases** | Paid |
| Size | 79 MB | 1 MB |
| Requires iOS | **15.0** | 17.6 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [ZipoApps](https://appshunter.io/developer/1671444635) | [Nitrio](https://appshunter.io/developer/321121189) |

## What reviewers say

### Smart Vibration Meter・Detector

[App page](https://appshunter.io/ios/app/smart-vibration-meterdetector/id1121590218)

This utility app transforms your phone into a seismograph to measure vibrations and detect earthquakes. It displays readings on both the Richter and Mercalli scales, offering insights into seismic activity.

**Highlights:** Measures vibration using phone sensors, Displays readings on Richter scale, Displays readings on Mercalli intensity scale, Acts as a seismic detector, Calibration feature for accuracy, Classifies seismic activity effects

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

**In-app purchases (17)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Unlimited access | $0.99 | per 7 days |
| Unlimited access | $1.99 | per 7 days |
| Unlimited access | $2.99 | per 7 days |
| Unlimited access | $3.99 | per 7 days |
| Unlock premuium features | $4.99 | per 7 days |
| Unlock premuium features | $5.99 | per 7 days |
| Unlock premuium features | $6.99 | per 7 days |
| Unlock premuium features | $7.99 | per 7 days |
| Unlock premuium features | $8.99 | per 7 days |
| Unlock premuium features | $9.99 | per year |
| Unlimited access | $19.99 | per year |
| Unlock premuium features | $19.99 | per month |
| Unlimited access | $29.99 | per year |
| Unlock premuium features | $29.99 | per month |
| Unlimited access | $39.99 | per year |
| Unlimited access | $49.99 | per year |
| Ads-Free | $0.99 | one-time |


### Magnetic Field Calc +

[App page](https://appshunter.io/ios/app/magnetic-field-calc-plus/id1423005752)

Calculate magnetic fields from electric currents with four distinct modes. Solve for any variable, visualize with interactive diagrams, and utilize flexible unit support. Works offline for convenience.

**Highlights:** Four calculation modes (Straight Wire, Loop, Solenoid, Toroid), Solve for any variable (field, current, distance, etc.), Interactive 2D diagrams, Flexible unit support (A, mA, m, cm, mm, T, µT, Gauss), Built-in reference sheet, Save and copy calculations, Offline functionality

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Smart Vibration Meter・Detector free?

Smart Vibration Meter・Detector is free to download, with in-app purchases available.

### Is Magnetic Field Calc + free?

Magnetic Field Calc + costs $2.99, with no in-app purchases.

### Which has better reviews, Smart Vibration Meter・Detector or Magnetic Field Calc +?

Smart Vibration Meter・Detector is rated higher. Smart Vibration Meter・Detector averages 4.1 out of 5 from 27 ratings, while Magnetic Field Calc + averages 4.0 from 1 ratings.

### Do Smart Vibration Meter・Detector or Magnetic Field Calc + have ads?

Smart Vibration Meter・Detector shows ads; Magnetic Field Calc + does not.

### Which is updated more often, Smart Vibration Meter・Detector or Magnetic Field Calc +?

Smart Vibration Meter・Detector ships an update every 8 months, and Magnetic Field Calc + every 27 months. Most recently, Smart Vibration Meter・Detector was updated on October 20, 2026 and Magnetic Field Calc + on October 11, 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.*