# Smart Vibration Meter・Detector vs SPro 4.0

The clearest difference is in-app purchases: SPro 4.0 at none against Smart Vibration Meter・Detector's 17. SPro 4.0 also leads on ads (none vs shown) and update cadence (monthly vs every 8 months). On price and device support there is nothing between them.

Both are free to download. Smart Vibration Meter・Detector sells 17 in-app purchases, starting at $0.99 per 7 days. SPro 4.0 asks for nothing beyond the download.

Smart Vibration Meter・Detector ships an update every 8 months, SPro 4.0 monthly. The most recent releases landed on October 3, 2026 and October 2, 2026 respectively.

## The numbers

| Metric | Smart Vibration Meter・Detector | SPro 4.0 |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.1 (27 ratings)](https://appshunter.io/ios/app/smart-vibration-meterdetector/id1121590218/reviews)** | — |
| Number of ratings | **27** | — |
| Positive reviews | 60.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | Every 8 months | **Monthly** |
| Monetization | Free with in-app purchases | — |
| Size | 79 MB | 39 MB |
| Requires iOS | 15.0 | **11.0** |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [ZipoApps](https://appshunter.io/developer/1671444635) | [FPT IS Company Limited](https://appshunter.io/developer/1437861502) |

## 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 |


### SPro 4.0

[App page](https://appshunter.io/ios/app/spro-40/id1559510838)

**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 SPro 4.0 free?

SPro 4.0 is free to download, with no in-app purchases.

### Do Smart Vibration Meter・Detector or SPro 4.0 have ads?

Smart Vibration Meter・Detector shows ads; SPro 4.0 does not.

### Which is updated more often, Smart Vibration Meter・Detector or SPro 4.0?

Smart Vibration Meter・Detector ships an update every 8 months, and SPro 4.0 monthly. Most recently, Smart Vibration Meter・Detector was updated on October 3, 2026 and SPro 4.0 on October 2, 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.*