# AutoCheck OBD vs OBD2 Scanner + Engine Sound

The clearest difference is in-app purchases: AutoCheck OBD at none against OBD2 Scanner + Engine Sound's 2. AutoCheck OBD also leads on ads (none vs shown). OBD2 Scanner + Engine Sound's advantage is update cadence (every 9 days vs every 2 months). On price, rating, ratings volume and device support there is nothing between them.

Both are free to download. OBD2 Scanner + Engine Sound sells 2 one-off in-app purchases. AutoCheck OBD asks for nothing beyond the download.

On the App Store both sit at effectively the same score — 4.0 for AutoCheck OBD against 4.0 for OBD2 Scanner + Engine Sound. Both are backed by a comparable volume of ratings — 1 and 1 respectively.

AutoCheck OBD ships an update every 2 months, OBD2 Scanner + Engine Sound every 9 days. The most recent releases landed on October 12, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | AutoCheck OBD | OBD2 Scanner + Engine Sound |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.0 (1 ratings)](https://appshunter.io/ios/app/autocheck-obd/id6771629013/reviews) | [4.0 (1 ratings)](https://appshunter.io/ios/app/obd2-scanner-plus-engine-sound/id6789023964/reviews) |
| Number of ratings | 1 | 1 |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 2 months | **Every 9 days** |
| Monetization | **Free** | Free with in-app purchases |
| Size | 4 MB | 6 MB |
| Requires iOS | 18.1 | **17.0** |
| Devices | iPhone | iPhone |
| Age rating | 12+ | 4+ |
| Developer | [Subin Revi](https://appshunter.io/developer/1694863615) | [Sena Takasawa](https://appshunter.io/developer/1887478690) |

## What reviewers say

### AutoCheck OBD

[App page](https://appshunter.io/ios/app/autocheck-obd/id6771629013)

Transform your iPhone into a professional OBD-II scanner. Read and clear diagnostic trouble codes with plain-language explanations, view live engine data in real-time, and generate comprehensive diagnostic reports. Explore all features with a demo mode before connecting an adapter.

**Highlights:** Read and clear DTCs, Plain-language code descriptions, Live engine data dashboard, Freeze-frame data capture, Shareable PDF diagnostic reports, Demo Mode for exploration, Multi-language support

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

**In-app purchases:** none


### OBD2 Scanner + Engine Sound

[App page](https://appshunter.io/ios/app/obd2-scanner-plus-engine-sound/id6789023964)

Monitor your car's engine performance and hear its sound in real-time. Customize your dashboard with various widgets and track your drives with detailed maps and trip data. Offers a demo mode and optional Pro features for an enhanced experience.

**Highlights:** Real-time OBD2 data display, Engine sound simulation based on RPM, Customizable dashboard with widgets, Trip computer and fuel economy tracking, Speed and RPM on map view, HUD mode for windshield projection

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remove Ads | $1.99 | one-time |
| car_ui Pro (One-Time) | $4.99 | one-time |


## Frequently asked questions

### Is AutoCheck OBD free?

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

### Is OBD2 Scanner + Engine Sound free?

OBD2 Scanner + Engine Sound is free to download, with in-app purchases available.

### Which has better reviews, AutoCheck OBD or OBD2 Scanner + Engine Sound?

AutoCheck OBD and OBD2 Scanner + Engine Sound are both rated 4.0 out of 5 on the App Store, from 1 and 1 ratings respectively.

### Do AutoCheck OBD or OBD2 Scanner + Engine Sound have ads?

OBD2 Scanner + Engine Sound shows ads; AutoCheck OBD does not.

### Which is updated more often, AutoCheck OBD or OBD2 Scanner + Engine Sound?

AutoCheck OBD ships an update every 2 months, and OBD2 Scanner + Engine Sound every 9 days. Most recently, AutoCheck OBD was updated on October 12, 2026 and OBD2 Scanner + Engine Sound on October 25, 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.*