# The Best Ruler vs Smart Vibration Meter・Detector

The clearest difference is review sentiment: Smart Vibration Meter・Detector at 60% against The Best Ruler's 0%. Smart Vibration Meter・Detector also leads on rating (4.1 vs 2.0) and ratings volume (27 vs 1). The Best Ruler's advantage is in-app purchases (none vs 17) and ads (none vs shown). On price, update cadence 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. The Best Ruler asks for nothing beyond the download.

Smart Vibration Meter・Detector holds the better App Store score, 4.1 against 2.0. 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. Written reviews point the same way: 0% of The Best Ruler's written reviews are positive against 60% of Smart Vibration Meter・Detector's.

The Best Ruler ships an update every 11 months, Smart Vibration Meter・Detector every 8 months. The most recent releases landed on October 30, 2026 and October 20, 2026 respectively.

## The numbers

| Metric | The Best Ruler | Smart Vibration Meter・Detector |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [2.0 (1 ratings)](https://appshunter.io/ios/app/the-best-ruler/id914330181/reviews) | **[4.1 (27 ratings)](https://appshunter.io/ios/app/smart-vibration-meterdetector/id1121590218/reviews)** |
| Number of ratings | 1 | **27** |
| Positive reviews | 0.0% of reviews | **60.0% of reviews** |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 11 months | **Every 8 months** |
| Monetization | **Free** | Free with in-app purchases |
| Size | 23 MB | 79 MB |
| Requires iOS | **7.0** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [NETIGEN Kluzowicz sp. j.](https://appshunter.io/developer/892331873) | [ZipoApps](https://appshunter.io/developer/1671444635) |

## What reviewers say

### The Best Ruler

[App page](https://appshunter.io/ios/app/the-best-ruler/id914330181)

Measure objects directly on your smartphone screen without needing traditional tools. This utility offers an easy-to-use interface with accurate scales in centimeters and inches, supporting both horizontal and vertical measurements.

**Highlights:** Measure objects on screen, Centimeter and inch scales, Horizontal and vertical display modes, Easy-to-use interface, Accurate measurements

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

**In-app purchases:** none


### 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 |


## Frequently asked questions

### Is The Best Ruler free?

The Best Ruler is free to download, with no in-app purchases.

### Is Smart Vibration Meter・Detector free?

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

### Which has better reviews, The Best Ruler or Smart Vibration Meter・Detector?

Smart Vibration Meter・Detector is rated higher. The Best Ruler averages 2.0 out of 5 from 1 ratings, while Smart Vibration Meter・Detector averages 4.1 from 27 ratings.

### Do The Best Ruler or Smart Vibration Meter・Detector have ads?

Smart Vibration Meter・Detector shows ads; The Best Ruler does not.

### Which is updated more often, The Best Ruler or Smart Vibration Meter・Detector?

The Best Ruler ships an update every 11 months, and Smart Vibration Meter・Detector every 8 months. Most recently, The Best Ruler was updated on October 30, 2026 and Smart Vibration Meter・Detector on October 20, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*