# Horizontal Accelerometer vs Hertz in CM

The clearest difference is price: Horizontal Accelerometer at Free against Hertz in CM's $0.49. Horizontal Accelerometer also leads on update cadence (every 6 weeks vs every 8 months). Hertz in CM's advantage is in-app purchases (none vs 1) and ads (none vs shown). On device support there is nothing between them.

Horizontal Accelerometer is free to download; Hertz in CM costs $0.49 up front. Horizontal Accelerometer sells 1 one-off in-app purchase. Hertz in CM asks for nothing beyond the download.

Horizontal Accelerometer ships an update every 6 weeks, Hertz in CM every 8 months. The most recent releases landed on November 3, 2026 and November 4, 2026 respectively.

## The numbers

| Metric | Horizontal Accelerometer | Hertz in CM |
| --- | --- | --- |
| Price | **Free** | $0.49 |
| Positive reviews | 50.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | **Every 6 weeks** | Every 8 months |
| Monetization | Ad-supported | — |
| Size | 8 MB | 0 MB |
| Requires iOS | 15.0 | **13.0** |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Takao Ichimura](https://appshunter.io/developer/1474061593) | [Stein Erik Nilsen](https://appshunter.io/developer/1737251651) |

## 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 (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remove Ads & Add Features | $5.99 | one-time |


### Hertz in CM

[App page](https://appshunter.io/ios/app/hertz-in-cm/id6479808392)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Horizontal Accelerometer free?

Horizontal Accelerometer is free to download, with in-app purchases available.

### Is Hertz in CM free?

Hertz in CM costs $0.49, with no in-app purchases.

### Do Horizontal Accelerometer or Hertz in CM have ads?

Horizontal Accelerometer shows ads; Hertz in CM does not.

### Which is updated more often, Horizontal Accelerometer or Hertz in CM?

Horizontal Accelerometer ships an update every 6 weeks, and Hertz in CM every 8 months. Most recently, Horizontal Accelerometer was updated on November 3, 2026 and Hertz in CM on November 4, 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.*