# Flat Speedometer vs CarSpeedTest

The clearest difference is in-app purchases: CarSpeedTest at none against Flat Speedometer's 2. CarSpeedTest also leads on update cadence (monthly vs every 5 months). Flat Speedometer's advantage is ads (none vs shown) and device support (4 vs 2). On price there is nothing between them.

Both are free to download. Flat Speedometer sells 2 one-off in-app purchases. CarSpeedTest asks for nothing beyond the download.

Flat Speedometer ships an update every 5 months, CarSpeedTest monthly. The most recent releases landed on June 3, 2026 and September 18, 2026 respectively.

## The numbers

| Metric | Flat Speedometer | CarSpeedTest |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/flat-speedometer/id900609236/reviews)** | — |
| Number of ratings | **1** | — |
| Positive reviews | 66.7% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | **No** | Yes |
| Update frequency | Every 5 months | **Monthly** |
| Monetization | Free with in-app purchases | — |
| Size | 32 MB | 11 MB |
| Requires iOS | **9.0** | 15 |
| Devices | **iPhone, iPad, iPod, Apple Watch** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Axel Backlund](https://appshunter.io/developer/1387836438) | [Weichen Cheng](https://appshunter.io/developer/1193049632) |

## What reviewers say

### 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 |


### CarSpeedTest

[App page](https://appshunter.io/ios/app/carspeedtest/id1539375221)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Flat Speedometer free?

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

### Is CarSpeedTest free?

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

### Do Flat Speedometer or CarSpeedTest have ads?

CarSpeedTest shows ads; Flat Speedometer does not.

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

Flat Speedometer ships an update every 5 months, and CarSpeedTest monthly. Most recently, Flat Speedometer was updated on June 3, 2026 and CarSpeedTest on September 18, 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.*