# BAS2 RRC vs ChkOBD OBD2 Analyzer

The clearest difference is in-app purchases: BAS2 RRC at none against ChkOBD OBD2 Analyzer's 4. BAS2 RRC also leads on iOS requirement (9.0 vs 13.0). ChkOBD OBD2 Analyzer's advantage is update cadence (every 3 months vs every 47 months). On price, 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. BAS2 RRC asks for nothing beyond the download.

BAS2 RRC ships an update every 47 months, ChkOBD OBD2 Analyzer every 3 months. The most recent releases landed on September 19, 2026 and June 5, 2026 respectively.

## The numbers

| Metric | BAS2 RRC | ChkOBD OBD2 Analyzer |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[3.0 (4 ratings)](https://appshunter.io/ios/app/chkobd-obd2-analyzer/id1511585011/reviews)** |
| Number of ratings | — | **4** |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 47 months | **Every 3 months** |
| Monetization | **Free** | Free with in-app purchases |
| Size | 25 MB | 63 MB |
| Requires iOS | **9.0** | 13.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Bell Auto Services Ltd](https://appshunter.io/developer/791753350) | [Check On-Board Diagnostics LLC](https://appshunter.io/developer/1511585010) |

## What reviewers say

### BAS2 RRC

[App page](https://appshunter.io/ios/app/bas2-rrc/id994176921)

Control an engine diagnostic tool for CAN-based cars. Read and clear fault codes, view live engine data graphically or numerically, and perform ECU service tests. Access ECU information and more through your iPhone or iPad.

**Highlights:** Fault code reading and clearing, Engine live data (numerical/graphical), ECU service tests, ECU information, Bluetooth Smart control

**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 BAS2 RRC free?

BAS2 RRC 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.

### Do BAS2 RRC or ChkOBD OBD2 Analyzer have ads?

Neither BAS2 RRC nor ChkOBD OBD2 Analyzer shows ads.

### Which is updated more often, BAS2 RRC or ChkOBD OBD2 Analyzer?

BAS2 RRC ships an update every 47 months, and ChkOBD OBD2 Analyzer every 3 months. Most recently, BAS2 RRC was updated on September 19, 2026 and ChkOBD OBD2 Analyzer on June 5, 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.*