# OBDII Trouble Codes Lite vs OBD2 Expert

The clearest difference is rating: OBD2 Expert at 4.1 against OBDII Trouble Codes Lite's 2.1. OBD2 Expert also leads on ads (none vs shown) and update cadence (every 2 months vs every 25 months). OBDII Trouble Codes Lite's advantage is review sentiment (31% vs 8%) and monetization model (ad-supported vs free with in-app purchases). On price, in-app purchases and device support there is nothing between them.

Both are free to download. OBDII Trouble Codes Lite sells 1 one-off in-app purchase and OBD2 Expert sells 4 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.

OBD2 Expert holds the better App Store score, 4.1 against 2.1. That said, the two scores are not equally well evidenced: OBD2 Expert has 725 ratings behind it against 7, so its average is the more settled of the two. Written reviews complicate that: 31% of OBDII Trouble Codes Lite's written reviews are positive against 8% of OBD2 Expert's, so the app with the better star average is not the one people write more warmly about.

OBDII Trouble Codes Lite ships an update every 25 months, OBD2 Expert every 2 months. The most recent releases landed on August 24, 2026 and September 24, 2026 respectively.

## The numbers

| Metric | OBDII Trouble Codes Lite | OBD2 Expert |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [2.1 (7 ratings)](https://appshunter.io/ios/app/obdii-trouble-codes-lite/id688952518/reviews) | **[4.1 (725 ratings)](https://appshunter.io/ios/app/obd2-expert/id1142156521/reviews)** |
| Number of ratings | 7 | **725** |
| Positive reviews | **31.3% of reviews** | 8.0% of reviews |
| In-app purchases | Yes | Yes |
| Ads | Yes | **No** |
| Update frequency | Every 25 months | **Every 2 months** |
| Monetization | **Ad-supported** | Free with in-app purchases |
| Size | 54 MB | 17 MB |
| Requires iOS | 15.6 | **9.3** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Oleg Chumakov](https://appshunter.io/developer/688892120) | [Michael Lauer](https://appshunter.io/developer/300205595) |

## What reviewers say

### OBDII Trouble Codes Lite

[App page](https://appshunter.io/ios/app/obdii-trouble-codes-lite/id688952518)

Access a comprehensive database of OBD II diagnostic trouble codes. Quickly look up definitions for generic and manufacturer-specific codes without an internet connection. Easily copy and share code descriptions.

**Highlights:** Extensive OBD II code definitions, Offline access, No car model selection needed, Copy and share descriptions, Supports generic and manufacturer codes

**Features:** macOS Compatibility, Family Sharing

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Full version | $2.99 | one-time |


### OBD2 Expert

[App page](https://appshunter.io/ios/app/obd2-expert/id1142156521)

Diagnose and monitor your vehicle's health by connecting an OBD2 adapter. View sensor data, read and reset trouble codes, and analyze diagnostic information. Developers can use it as a hardware simulator or protocol bridge.

**Highlights:** 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

**Features:** macOS Compatibility

**In-app purchases (4)**

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

**What reviewers like**

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

**What reviewers complain about**

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

**Reported bugs**

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

**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


## Frequently asked questions

### Is OBDII Trouble Codes Lite free?

OBDII Trouble Codes Lite is free to download, with in-app purchases available.

### Is OBD2 Expert free?

OBD2 Expert is free to download, with in-app purchases available.

### Which has better reviews, OBDII Trouble Codes Lite or OBD2 Expert?

OBD2 Expert is rated higher. OBDII Trouble Codes Lite averages 2.1 out of 5 from 7 ratings, while OBD2 Expert averages 4.1 from 725 ratings.

### Do OBDII Trouble Codes Lite or OBD2 Expert have ads?

OBDII Trouble Codes Lite shows ads; OBD2 Expert does not.

### Which is updated more often, OBDII Trouble Codes Lite or OBD2 Expert?

OBDII Trouble Codes Lite ships an update every 25 months, and OBD2 Expert every 2 months. Most recently, OBDII Trouble Codes Lite was updated on August 24, 2026 and OBD2 Expert on September 24, 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.*