# Smart Vibration Meter・Detector vs IntervAI

The clearest difference is price: Smart Vibration Meter・Detector at Free against IntervAI's $9.99. IntervAI's advantage is in-app purchases (none vs 17) and ads (none vs shown). On device support and iOS requirement there is nothing between them.

Smart Vibration Meter・Detector is free to download; IntervAI costs $9.99 up front. Smart Vibration Meter・Detector sells 17 in-app purchases, starting at $0.99 per 7 days. IntervAI asks for nothing beyond the download.

Smart Vibration Meter・Detector ships an update every 8 months, IntervAI every 3 weeks. The most recent releases landed on October 3, 2026 and October 5, 2026 respectively.

## The numbers

| Metric | Smart Vibration Meter・Detector | IntervAI |
| --- | --- | --- |
| Price | **Free** | $9.99 |
| 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 | **Every 3 weeks** |
| Monetization | Free with in-app purchases | — |
| Size | 79 MB | 3 MB |
| Requires iOS | 15.0 | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | +4 |
| Developer | [ZipoApps](https://appshunter.io/developer/1671444635) | [Yu Huang](https://appshunter.io/developer/1873873379) |

## 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 |


### IntervAI

[App page](https://appshunter.io/ios/app/intervai-interview-copilot/id6758596978)

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

**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 IntervAI free?

IntervAI costs $9.99, with no in-app purchases.

### Do Smart Vibration Meter・Detector or IntervAI have ads?

Smart Vibration Meter・Detector shows ads; IntervAI does not.

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

Smart Vibration Meter・Detector ships an update every 8 months, and IntervAI every 3 weeks. Most recently, Smart Vibration Meter・Detector was updated on October 3, 2026 and IntervAI on October 5, 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.*