# OBD2 Expert — ScanTool, Simulator & Bridge

> OBD2 vehicle diagnostics, monitoring, and developer tool with simulator/bridge. (iPhone/iPad app by Michael Lauer.)

- Source: https://appshunter.io/ios/app/obd2-expert/id1142156521 (this page in markdown: same URL + `.md`)
- Developer: [Michael Lauer](https://appshunter.io/developer/300205595)
- Category: Utilities, Travel
- Price: Free with in-app purchases
- Rating: 4.06/5 from 725 App Store ratings · 199 written reviews indexed
- Age rating: 4+
- Requires: iOS 9.3 · 17 MB
- Languages: English, German
- Released: 2016-09-23
- Data updated: 2026-08-28
- Monetization: free with in-app purchases
- User reviews in markdown: https://appshunter.io/ios/app/obd2-expert/id1142156521/reviews.md

## What is OBD2 Expert?

OBD2-Expert is the new competent solution for vehicle diagnostics and monitoring.

=== The Highlights ===

A) Reveal vehicle problems before visiting the garage.
B) Load vehicle status files and try the functionality of the app.
C) Share your vehicle status with others and discuss solutions.
D) For developers: Use this app as BTLE-OBD2-ScanTool instead of an expensive hardware simulator.
E) For learning: Use this app as BTLE/WiFi Bridge and inspect the protocol communication.

=== The Details ===

A) Reveal vehicle problems before visiting the garage.

Connect an OBD2 WiFi or BLE adapter to your vehicle and select it from the app. View the current sensor data. Load the diagnostic trouble codes (DTC) and inspect the freeze frame data from when the error occured. The component monitoring can tell you about potential problems by showing contiguous and non-contiguous monitors as well as a detailed analysis of mode 6 diagnostics (if supported by your vehicle). If you can fix your vehicle yourself, reset the saved DTC.

B) Load vehicle status files and try the functionality of the app.

Tired of buying promising apps that don't work? Try this app for free by loading a vehicle status file instead of connecting it to an adapter.

C) Share your vehicle status with others and discuss solutions.

With this app, you can capture the state of your vehicle including all DTCs and sensor data – either for later diagnostics or to share with other people.

D) For developers: Use this app as BLE-OBD2-ScanTool instead of an expensive hardware simulator.

Are you developing an OBD2-ScanTool and not having access to dozens of vehicles with their protocols? This app can work as a BLE-OBD2-ScanTool adapter, sparing you the cost of a professional hardware simulator.

E) For learning: Use this app as BTLE/WiFi Bridge and inspect the protocol communication.

If you want to learn about the OBD2 protocol communication, you can use your BTLE dongle and bridge it via WiFi to another OBD2 app (this requires an iPad Pro where you can run two apps side-by-side or another physical phone or tablet).

=== Supported Bluetooth hardware ===

Please note that this App will _not_ work with Bluetooth 2.x or 3.x adapters! This is a hardware limitation which can't be changed. Many very cheap BTLE OBD2 adapters are not Bluetooth 4.0, so please be aware of that.

=== Closing Note ===

OBD2-Expert is not a oneshot project. We want to support and continually develop this app. Hold your breath for exciting coming features. Please use the Support-URL to communicate your feedback to us!

## Key features

- Vehicle diagnostics and monitoring
- Read and reset diagnostic trouble codes (DTC)
- View current sensor data
- Analyze Mode 6 diagnostics
- Load vehicle status files for testing
- Share vehicle status data
- BLE/WiFi OBD2 ScanTool simulator for developers
- OBD2 protocol communication bridge

## Pricing and in-app purchases

Base price: Free.

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| Operation Mode ScanTool | $2.99 | one-time |
| Operation Mode Simulator | $4.99 | one-time |
| All Features | $5.99 | one-time |
| Operation Mode Bridge | $0.99 | one-time |


## What do users think of OBD2 Expert?

Overall sentiment: negative

**Pros**

- 👍 Works well
- 🚀 Fast and responsive
- 💡 Useful features

**Cons**

- 🐛 Crashes frequently
- 🔒 Requires payment to unlock core functionality
- ⚠️ Doesn't detect/connect to OBD2 adapter
- 🤖 Lacks instructions/documentation
- 💸 Overpriced for limited functionality

**Commonly reported bugs**

- Freezes during use
- Fails to recognize compatible OBD2 adapters
- Inaccurate vehicle information detection

**Most requested features**

- Add support for more vehicle models
- Implement live data monitoring
- Include ability to clear diagnostic codes
- Provide free trial period to test functionality

## Recent user reviews (10 of 199)

All indexed reviews: https://appshunter.io/ios/app/obd2-expert/id1142156521/reviews.md

### 1/5 — Bas buy

*2025-06-26, version 1.3.2*

Always disconnect

### 1/5 — Stuck at “loading services” forever

*2025-02-13, version 1.3.2*

Somehow it keeps scanning for tens of bluetooth devices around me, instead of allowing me to simple pick the obd one, and it keeps “scanning services” forever, I waited for longer than 20 minutes for nothing

### 5/5 — Audi a3 quatre sport Line

*2024-12-30, version 1.3.2*

Introuvable

### 1/5 — Does not read trouble codes

*2024-11-12, version 1.3.2*

Purchased the OBD2 app to scan trouble codes. I hooked it up to an Elm Wi-Fi adapter, got it connected, but does not seem to read any codes or do anything beyond identify the vehicle. No settings or instructions. I purchased it as I thought it could read and clear codes. It does less than free apps currently. Maybe I’m missing something.

### 1/5 — Don’t waste your time & money!!

*2023-11-30, version 1.3.2*

I downloaded the app, paid for the complete app and the only thing the app does is “identifying..” my OBD tool that is clearly shown when you try and connect! Closed the app 5 times and the same thing every time, identifying but never connecting!

### 5/5 — Top

*2023-11-10, version 1.3.2*

Coole Software funktioniert bei meinem e46 super und schnell

### 1/5 — Müll

*2023-08-27, version 1.3.2*

Nutzloses Zeug

### 1/5 — App

*2023-08-08, version 1.3.2*

Die app ist völliger Müll. Hab 4 € bezahlt damit ich die OBD2 Funktionen auslesen kann. Also nur Motor. Das geht auch mit kostenloser Software. Nucht empfehlenswert

### 1/5 — Scam

*2023-07-05, version 1.3.2*

Apple please do something about this

### 1/5 — Nutzlos

*2023-04-20, version 1.3.2*

Selbst zum Testen ob zum Dongle überhaupt eine Verbindung aufgebaut werden kann muss bezahlt werden. Ob es dann auch funktioniert ist fraglich.

## Frequently asked questions about OBD2 Expert

### What does OBD2 Expert do?

OBD2 Expert is a comprehensive tool for vehicle diagnostics and monitoring. It allows you to connect an OBD2 adapter to your vehicle to view real-time sensor data, read and clear diagnostic trouble codes (DTCs), and analyze various diagnostic parameters like Mode 6.

### What are the key features of OBD2 Expert?

Key features include revealing vehicle problems before visiting a garage, loading vehicle status files to test app functionality, sharing vehicle status data with others, acting as a BLE-OBD2-ScanTool for developers, and serving as a BTLE/WiFi Bridge to inspect OBD2 protocol communication.

### Is OBD2 Expert free to use?

The app is free to download and offers the ability to load vehicle status files to try out its functionality without connecting to an adapter. However, full functionality, including connecting to an OBD2 adapter, may involve in-app purchases.

### What kind of Bluetooth hardware does OBD2 Expert support?

OBD2 Expert supports Bluetooth 4.0 (BLE) adapters. It will not work with older Bluetooth 2.x or 3.x adapters due to hardware limitations. It's important to ensure your OBD2 adapter is Bluetooth 4.0 compatible.

### How can developers use OBD2 Expert?

Developers can utilize OBD2 Expert as a BLE-OBD2-ScanTool, eliminating the need for expensive hardware simulators when developing OBD2-related applications. Additionally, it can function as a BTLE/WiFi Bridge, allowing inspection of OBD2 protocol communication for learning or debugging purposes.

## Version history (last 5 releases)

### 1.3.2 — 2018-04-11

This app has been updated by Apple to display the Apple Watch app icon.

* Improved compatibility with (more or less) ELM327-compatible adapters.
* Better performance: Now 30% less data traffic due to a more compact transfer syntax.
* In some rare cases during setup the App claimed that a WiFi controller wasn't recognized, although it was already identified.

### 1.3.1 — 2017-12-13

* ScanTool: Relax ELM327 identification requirement to improve compatibility with more clones.

### 1.3 — 2017-10-24

- Allow sending a communication log in case of an unidentified OBD2 WiFi adapter or a vehicle protocol incompatibility
- Add setting for extra communication delay (required by some slow OBD2 adapters)
- Improve compatibility with newer OBD2 WiFi adapters
- Improve compatibility with newer devices and operating system versions

### 1.2 — 2016-11-16

This version brings you a major new feature and some important fixes:

- [FEATURE] The component monitoring now shows a third tab "Diagnostics" which contains in-depth OBD2 mode 6 analysis parameters (if supported by the vehicle).
- [BUGFIX] The component monitoring tab "Cumulated Values" was sometimes not active although the vehicle transmitted data.
- [OTHER] The protocol parser is now safer against invalid / short frames.

Please keep the feature suggestions coming via the support-URL.

### 1.1 — 2016-10-31

Fixes:
 - Sensor Data: Resolved a rare crash when using the 'Navigation back' drag gesture
 - Component Monitoring: Resolved a potential crash for vehicles that have a faulty OBD2 protocol implementation

Added:
 - Component Monitoring: Show a warning alert when a faulty OBD2 protocol implementation has been detected
 - BTLE/WiFi Bridge: Use a BTLE adapter and export it via WiFi to another OBD2 app

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## More apps by Michael Lauer

- [Wellenreiter](https://appshunter.io/ios/app/wellenreiter/id1069855738)
- [Surveillance Pro](https://appshunter.io/ios/app/surveillance-pro/id1200773811)
- [Song Book Pro](https://appshunter.io/ios/app/song-book-pro/id1361508365)
- [BLE Laboratory Pro](https://appshunter.io/ios/app/ble-laboratory-pro/id1436021089)
- [MIDI XY-PAD](https://appshunter.io/ios/app/midi-xy-pad/id1491657131)

All apps by Michael Lauer: https://appshunter.io/developer/300205595

## Related topics

[incardoc](https://appshunter.io/ios/topics/incardoc) · [obd2 wifi](https://appshunter.io/ios/topics/obd2-wifi) · [iobd2](https://appshunter.io/ios/topics/iobd2)

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-08-28.*