# OBD2 Enhance Trouble Code Lite vs Carmin

The clearest difference is in-app purchases: OBD2 Enhance Trouble Code Lite at none against Carmin's 2. OBD2 Enhance Trouble Code Lite also leads on rating (4.6 vs 4.3). Carmin's advantage is update cadence (every 5 weeks vs every 6 months) and ratings volume (223 vs 7). On price, review sentiment, ads and device support there is nothing between them.

Both are free to download. Carmin sells 2 in-app purchases, starting at $4.99 per month. OBD2 Enhance Trouble Code Lite asks for nothing beyond the download.

OBD2 Enhance Trouble Code Lite holds the better App Store score, 4.6 against 4.3. That said, the two scores are not equally well evidenced: Carmin has 223 ratings behind it against 7, so its average is the more settled of the two. Written reviews point the same way: 60% of OBD2 Enhance Trouble Code Lite's written reviews are positive against 55% of Carmin's.

OBD2 Enhance Trouble Code Lite ships an update every 6 months, Carmin every 5 weeks. The most recent releases landed on September 17, 2026 and September 24, 2026 respectively.

## The numbers

| Metric | OBD2 Enhance Trouble Code Lite | Carmin |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.6 (7 ratings)](https://appshunter.io/ios/app/obd2-enhance-trouble-code-lite/id1096705571/reviews)** | [4.3 (223 ratings)](https://appshunter.io/ios/app/carmin/id1527982107/reviews) |
| Number of ratings | 7 | **223** |
| Positive reviews | **60.0% of reviews** | 54.9% of reviews |
| In-app purchases | **No** | Yes |
| Ads | Yes | Yes |
| Update frequency | Every 6 months | **Every 5 weeks** |
| Monetization | **Ad-supported** | Free with in-app purchases |
| Size | 30 MB | 18 MB |
| Requires iOS | 12.1 | **12** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Sang Tran](https://appshunter.io/developer/1091291351) | [Chuan Nguyen Van](https://appshunter.io/developer/1527982109) |

## What reviewers say

### OBD2 Enhance Trouble Code Lite

[App page](https://appshunter.io/ios/app/obd2-enhance-trouble-code-lite/id1096705571)

This app provides definitions and potential causes for On-Board Diagnostics (OBD) trouble codes. It covers a wide range of generic and manufacturer-specific codes for numerous vehicle models, helping users understand and potentially fix error codes.

**Highlights:** DTC definitions from workshop manuals, Possible causes for error codes, Covers 73 vehicle models, Supports P, B, C, U system codes, Includes generic and OEM codes, OBD1 code support

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

**In-app purchases:** none


### Carmin

[App page](https://appshunter.io/ios/app/carmin/id1527982107)

Access a comprehensive library of regularly updated automotive electrical wiring diagrams for car repair and study.  Includes videos and technical documents for research and reference.

**Highlights:** Electrical wiring diagrams, Regularly updated diagrams, Videos library, Technical documents, Car repair reference, Study purposes

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly | $4.99 | per month |
| Annual | $49.99 | per year |

**What reviewers like**

- 📚 Comprehensive vehicle diagram database
- 💰 Free version available with good content
- 🎯 Helpful for car diagnostics and repairs
- ⚡ Quick access to wiring information
- 🌍 Supports multiple vehicle brands and models

**What reviewers complain about**

- 📺 Excessive advertisements in free version
- 🐛 Frequent app crashes and instability on iOS
- 🚫 Limited vehicle coverage (missing years and models)
- 🔤 Diagrams display as code/symbols instead of images
- 🌐 Language limitations (primarily English)

**Reported bugs**

- App crashes when opening diagrams on iOS
- App only opens one diagram per session before crashing
- Requires reinstallation to function properly
- Diagrams display as code/hieroglyphics instead of images
- Crashes on iOS 15, 16, and 17

**Requested features**

- Search functionality by make/model/year
- Alphabetical sorting of vehicles
- Favorites/bookmarks for frequently used diagrams
- Wiring color codes display
- Ability to isolate specific wiring for clarity


## Frequently asked questions

### Is OBD2 Enhance Trouble Code Lite free?

OBD2 Enhance Trouble Code Lite is free to download, with no in-app purchases.

### Is Carmin free?

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

### Which has better reviews, OBD2 Enhance Trouble Code Lite or Carmin?

OBD2 Enhance Trouble Code Lite is rated higher. OBD2 Enhance Trouble Code Lite averages 4.6 out of 5 from 7 ratings, while Carmin averages 4.3 from 223 ratings.

### Do OBD2 Enhance Trouble Code Lite or Carmin have ads?

Both OBD2 Enhance Trouble Code Lite and Carmin show ads.

### Which is updated more often, OBD2 Enhance Trouble Code Lite or Carmin?

OBD2 Enhance Trouble Code Lite ships an update every 6 months, and Carmin every 5 weeks. Most recently, OBD2 Enhance Trouble Code Lite was updated on September 17, 2026 and Carmin 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.*