# Horizontal Accelerometer vs Hotaglow

The clearest difference is ads: Hotaglow at none against Horizontal Accelerometer's shown. Hotaglow also leads on update cadence (fortnightly vs every 6 weeks). Horizontal Accelerometer's advantage is iOS requirement (15.0 vs 17.0). On price, in-app purchases and device support there is nothing between them.

Both are free to download. Horizontal Accelerometer sells 1 one-off in-app purchase and Hotaglow sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

Horizontal Accelerometer ships an update every 6 weeks, Hotaglow fortnightly. The most recent releases landed on October 26, 2026 and October 5, 2026 respectively.

## The numbers

| Metric | Horizontal Accelerometer | Hotaglow |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 50.0% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | Yes | **No** |
| Update frequency | Every 6 weeks | **Fortnightly** |
| Monetization | Ad-supported | — |
| Size | 8 MB | 3 MB |
| Requires iOS | **15.0** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Takao Ichimura](https://appshunter.io/developer/1474061593) | [CHUN WANG](https://appshunter.io/developer/1809914632) |

## 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 |


### Hotaglow

[App page](https://appshunter.io/ios/app/hotaglow-outdoor-sos-light/id6787072008)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Hotaglow Premium | $2.99 | one-time |


## Frequently asked questions

### Is Horizontal Accelerometer free?

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

### Is Hotaglow free?

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

### Do Horizontal Accelerometer or Hotaglow have ads?

Horizontal Accelerometer shows ads; Hotaglow does not.

### Which is updated more often, Horizontal Accelerometer or Hotaglow?

Horizontal Accelerometer ships an update every 6 weeks, and Hotaglow fortnightly. Most recently, Horizontal Accelerometer was updated on October 26, 2026 and Hotaglow on October 5, 2026.

---

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