# Horizontal Accelerometer vs Ruler msg

The clearest difference is ads: Ruler msg at none against Horizontal Accelerometer's shown. Horizontal Accelerometer's advantage is device support (3 vs 1) and iOS requirement (13.0 vs 16.1). On price, update cadence and in-app purchases there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Horizontal Accelerometer ships an update every 6 weeks, Ruler msg every 5 weeks. The most recent releases landed on October 7, 2026 and September 28, 2026 respectively.

## The numbers

| Metric | Horizontal Accelerometer | Ruler msg |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 50.0% of reviews | — |
| In-app purchases | No | No |
| Ads | Yes | **No** |
| Update frequency | Every 6 weeks | **Every 5 weeks** |
| Monetization | Ad-supported | — |
| Size | 6 MB | 6 MB |
| Requires iOS | **13.0** | 16.1 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Takao Ichimura](https://appshunter.io/developer/1474061593) | [kenshin miyamoto](https://appshunter.io/developer/1672328137) |

## What reviewers say

### Horizontal Accelerometer

[App page](https://appshunter.io/ios/app/horizontal-accelerometer/id6444095874)

This tool measures real-time horizontal acceleration, deceleration, and lateral G-force for automobiles. It features color-coded zones and sounds for easy understanding while driving and can also be used for engineering education and evaluating structural rigidity.

**Highlights:** Real-time horizontal acceleration measurement, Measures deceleration and lateral G-force, Color zones and sound alerts for values, Calibration for accurate readings, Peak hold and max value tracking, Adjustable color zone thresholds and sound

**Features:** Vision Pro support

**In-app purchases:** none


### Ruler msg

[App page](https://appshunter.io/ios/app/ruler-msg/id6445908328)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Horizontal Accelerometer free?

Horizontal Accelerometer is free to download, with no in-app purchases.

### Is Ruler msg free?

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

### Do Horizontal Accelerometer or Ruler msg have ads?

Horizontal Accelerometer shows ads; Ruler msg does not.

### Which is updated more often, Horizontal Accelerometer or Ruler msg?

Horizontal Accelerometer ships an update every 6 weeks, and Ruler msg every 5 weeks. Most recently, Horizontal Accelerometer was updated on October 7, 2026 and Ruler msg on September 28, 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.*