# iOBD2 vs ChkOBD OBD2 Analyzer

The clearest difference is rating: iOBD2 at 4.0 against ChkOBD OBD2 Analyzer's 3.0. iOBD2 also leads on in-app purchases (none vs 4) and ratings volume (19 vs 4). On price, update cadence, ads and device support there is nothing between them.

Both are free to download. ChkOBD OBD2 Analyzer sells 4 in-app purchases, starting at $4.99 per month. iOBD2 asks for nothing beyond the download.

iOBD2 holds the better App Store score, 4.0 against 3.0. Both are backed by a comparable volume of ratings — 19 and 4 respectively.

Both ship on a similar rhythm, roughly every 3 months. The most recent releases landed on October 20, 2026 and October 13, 2026 respectively.

## The numbers

| Metric | iOBD2 | ChkOBD OBD2 Analyzer |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.0 (19 ratings)](https://appshunter.io/ios/app/iobd2-dtc/id710380105/reviews)** | [3.0 (4 ratings)](https://appshunter.io/ios/app/chkobd-obd2-analyzer/id1511585011/reviews) |
| Number of ratings | **19** | 4 |
| Positive reviews | 28.6% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 3 months | Every 3 months |
| Monetization | **Free** | Free with in-app purchases |
| Size | 44 MB | 63 MB |
| Requires iOS | **4.3** | 13.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [翔宇 金](https://appshunter.io/developer/528881861) | [Check On-Board Diagnostics LLC](https://appshunter.io/developer/1511585010) |

## What reviewers say

### iOBD2

[App page](https://appshunter.io/ios/app/iobd2-dtc/id710380105)

This app serves as a reference for standard Diagnostic Trouble Codes (DTCs) found in vehicles. It helps users understand fault codes generated by a car's onboard computer, aiding in problem diagnosis.

**Highlights:** Diagnostic Trouble Code reference, Fault code lookup, Vehicle system diagnostics, Problem identification

**Features:** macOS Compatibility

**In-app purchases:** none


### ChkOBD OBD2 Analyzer

[App page](https://appshunter.io/ios/app/chkobd-obd2-analyzer/id1511585011)

Connect your iPhone or iPad to your car's engine to view vital data. Access basic engine values for free, with in-app purchases for advanced diagnostics, smog check readiness, VIN analysis, and error decoding.

**Highlights:** View engine values, In-app purchase for advanced data, Smog Check Assistant, VIN Analyzer, Error Decoder and Reset, Bluetooth adapter compatibility check

**Features:** Vision Pro support

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Smog Check Assistant | $4.99 | per month |
| VIN Analyzer | $1.99 | one-time |
| Error Analyzer | $2.99 | one-time |
| Advance Engine Values | $4.99 | one-time |


## Frequently asked questions

### Is iOBD2 free?

iOBD2 is free to download, with no in-app purchases.

### Is ChkOBD OBD2 Analyzer free?

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

### Which has better reviews, iOBD2 or ChkOBD OBD2 Analyzer?

iOBD2 is rated higher. iOBD2 averages 4.0 out of 5 from 19 ratings, while ChkOBD OBD2 Analyzer averages 3.0 from 4 ratings.

### Do iOBD2 or ChkOBD OBD2 Analyzer have ads?

Neither iOBD2 nor ChkOBD OBD2 Analyzer shows ads.

### Which is updated more often, iOBD2 or ChkOBD OBD2 Analyzer?

iOBD2 ships an update every 3 months, and ChkOBD OBD2 Analyzer every 3 months. Most recently, iOBD2 was updated on October 20, 2026 and ChkOBD OBD2 Analyzer on October 13, 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.*