# OBD SOUND vs Speedometer

The clearest difference is rating: Speedometer at 4.6 against OBD SOUND's 2.5. Speedometer also leads on review sentiment (69% vs 31%) and in-app purchases (none vs 1). OBD SOUND's advantage is iOS requirement (9.0 vs 13.0). On price, update cadence, ads and device support there is nothing between them.

Both are free to download. OBD SOUND sells 1 one-off in-app purchase. Speedometer asks for nothing beyond the download.

Speedometer holds the better App Store score, 4.6 against 2.5. That said, the two scores are not equally well evidenced: Speedometer has 1.8K ratings behind it against 38, so its average is the more settled of the two. Written reviews point the same way: 31% of OBD SOUND's written reviews are positive against 69% of Speedometer's.

Both ship on a similar rhythm, roughly every 2 months. The most recent releases landed on October 13, 2026 and October 21, 2026 respectively.

## The numbers

| Metric | OBD SOUND | Speedometer |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [2.5 (38 ratings)](https://appshunter.io/ios/app/obd-sound/id960839379/reviews) | **[4.6 (1.8K ratings)](https://appshunter.io/ios/app/speedometer/id1465431716/reviews)** |
| Number of ratings | 38 | **1.8K** |
| Positive reviews | 30.7% of reviews | **69.1% of reviews** |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 2 months | Every 2 months |
| Monetization | Free with in-app purchases | **Ad-supported** |
| Size | 75 MB | 7 MB |
| Requires iOS | **9.0** | 13.0 |
| Devices | iPhone, iPad, iPod | **iPhone, iPad, iPod, Apple Watch** |
| Age rating | 12+ | 4+ |
| Developer | [artur tagirov](https://appshunter.io/developer/931425259) | [UniCom Technology](https://appshunter.io/developer/1270764210) |

## What reviewers say

### OBD SOUND

[App page](https://appshunter.io/ios/app/obd-sound/id960839379)

Transform your standard car into a sports car with realistic engine sounds. This app uses your Wi-Fi OBD adapter to read ECU data and generate dynamic engine and turbocharger sounds, playable through your car's audio system. A demo mode is available for testing without an adapter.

**Highlights:** Real-time ECU data reading, Customizable engine sounds, Turbocharger sound effects, Demo mode for testing, Wi-Fi OBD adapter integration, Audio output via AUX, Bluetooth, or FM transmitter

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Unlock all sounds | $3.99 | one-time |


### Speedometer

[App page](https://appshunter.io/ios/app/speedometer/id1465431716)

Track your speed and location with a GPS-powered dashboard. Features include weather updates, a compass, and speed limit alerts based on real-time road data. Customize the display and utilize HUD mode for enhanced visibility.

**Highlights:** GPS speed tracking, Map location display, Current weather and temperature, Analog compass, Speed limit alerts, HUD mode, Apple Watch support

**Features:** macOS Compatibility, Apple Watch app, Vision Pro support

**In-app purchases:** none

**What reviewers like**

- 🚀 Accurate speedometer
- 👍 Great design and layout
- 🔍 Useful features (compass, weather, time)
- 💡 Customizable colors
- 👍 Easy to use interface

**What reviewers complain about**

- 🔍 Small GPS map
- 🐛 Inaccurate odometer
- 🔋 Music volume drops when app is active
- 🔍 Needs larger settings buttons

**Reported bugs**

- Speedometer not accurate at high speeds
- GPS signal slow to update
- Speed limit not always correct

**Requested features**

- Option to remove ads
- Thicker/bolder font for better readability


## Frequently asked questions

### Is OBD SOUND free?

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

### Is Speedometer free?

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

### Which has better reviews, OBD SOUND or Speedometer?

Speedometer is rated higher. OBD SOUND averages 2.5 out of 5 from 38 ratings, while Speedometer averages 4.6 from 1.8K ratings.

### Do OBD SOUND or Speedometer have ads?

Neither OBD SOUND nor Speedometer shows ads.

### Which is updated more often, OBD SOUND or Speedometer?

OBD SOUND ships an update every 2 months, and Speedometer every 2 months. Most recently, OBD SOUND was updated on October 13, 2026 and Speedometer on October 21, 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.*