# ChatCar 챗카 OBD2 차량진단 vs B

The clearest difference is update cadence: B at every 3 days against ChatCar 챗카 OBD2 차량진단's every 2 weeks. B also leads on iOS requirement (13.0 vs 15.0). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

ChatCar 챗카 OBD2 차량진단 ships an update every 2 weeks, B every 3 days. The most recent releases landed on November 10, 2026 and November 5, 2026 respectively.

## The numbers

| Metric | ChatCar 챗카 OBD2 차량진단 | B |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 weeks | **Every 3 days** |
| Size | 28 MB | 31 MB |
| Requires iOS | 15.0 | **13.0** |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Youngwin Co., Ltd](https://appshunter.io/developer/6781990692) | [IN&OUT Co.,Ltd.](https://appshunter.io/developer/6783921917) |

## What reviewers say

### ChatCar 챗카 OBD2 차량진단

[App page](https://appshunter.io/ios/app/chatcar-obd2/id6781990690)

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

**In-app purchases:** none


### B

[App page](https://appshunter.io/ios/app/b-sync/id6783921705)

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

**In-app purchases:** none


## Frequently asked questions

### Is ChatCar 챗카 OBD2 차량진단 free?

ChatCar 챗카 OBD2 차량진단 is free to download, with no in-app purchases.

### Is B free?

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

### Do ChatCar 챗카 OBD2 차량진단 or B have ads?

Neither ChatCar 챗카 OBD2 차량진단 nor B shows ads.

### Which is updated more often, ChatCar 챗카 OBD2 차량진단 or B?

ChatCar 챗카 OBD2 차량진단 ships an update every 2 weeks, and B every 3 days. Most recently, ChatCar 챗카 OBD2 차량진단 was updated on November 10, 2026 and B on November 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.*