# Accelerometer vs Flat Speedometer

The clearest difference is rating: Flat Speedometer at 5.0 against Accelerometer's 4.0. Flat Speedometer also leads on review sentiment (67% vs 54%) and device support (4 vs 2). On price, ratings volume, update cadence and ads there is nothing between them.

Both are free to download. Accelerometer sells 1 one-off in-app purchase and Flat Speedometer sells 2 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.

Flat Speedometer holds the better App Store score, 5.0 against 4.0. Both are backed by a comparable volume of ratings — 1 and 1 respectively. Written reviews point the same way: 54% of Accelerometer's written reviews are positive against 67% of Flat Speedometer's.

Both ship on a similar rhythm, roughly every 5 months. The most recent releases landed on June 9, 2026 and June 3, 2026 respectively.

## The numbers

| Metric | Accelerometer | Flat Speedometer |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.0 (1 ratings)](https://appshunter.io/ios/app/accelerometer-g-force-meter/id499629589/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/flat-speedometer/id900609236/reviews)** |
| Number of ratings | 1 | 1 |
| Positive reviews | 53.7% of reviews | **66.7% of reviews** |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 5 months | Every 5 months |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Size | 2 MB | 32 MB |
| Requires iOS | 17.6 | **9.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod, Apple Watch** |
| Age rating | 4+ | 4+ |
| Developer | [Jan Halozan](https://appshunter.io/developer/482137824) | [Axel Backlund](https://appshunter.io/developer/1387836438) |

## What reviewers say

### Accelerometer

[App page](https://appshunter.io/ios/app/accelerometer-g-force-meter/id499629589)

Transform your device into a precise 3-axis accelerometer. Monitor live acceleration and G-force readings, record motion data, and export it in various formats for detailed analysis. Ideal for experiments, testing, and engineering.

**Highlights:** Realtime X/Y/Z acceleration, G-force measurement, Record motion sessions, CSV/JSON/XML export, Adjustable sample rate, Max/Min tracking

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Accelerometer Pro | $1.99 | one-time |


### Flat Speedometer

[App page](https://appshunter.io/ios/app/flat-speedometer/id900609236)

This app provides a clear and simple way to view your current speed in various units. It offers a HUD mode for easy in-car viewing and a feature to track your top speed. Additional sensors like accelerometer and altimeter are available via in-app purchases.

**Highlights:** Multiple speed units (mph, km/h, knots, m/s), HUD mode for car use, Top speed tracking, Ad-free experience, Accelerometer (in-app purchase), Altimeter (in-app purchase)

**Features:** macOS Compatibility

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Altitude | $0.99 | one-time |
| Accelerometer | $0.99 | one-time |


## Frequently asked questions

### Is Accelerometer free?

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

### Is Flat Speedometer free?

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

### Which has better reviews, Accelerometer or Flat Speedometer?

Flat Speedometer is rated higher. Accelerometer averages 4.0 out of 5 from 1 ratings, while Flat Speedometer averages 5.0 from 1 ratings.

### Do Accelerometer or Flat Speedometer have ads?

Neither Accelerometer nor Flat Speedometer shows ads.

### Which is updated more often, Accelerometer or Flat Speedometer?

Accelerometer ships an update every 5 months, and Flat Speedometer every 5 months. Most recently, Accelerometer was updated on June 9, 2026 and Flat Speedometer on June 3, 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.*