# Mucar vs KDIAG

The clearest difference is rating: Mucar at 4.6 against KDIAG's 3.4. Mucar also leads on review sentiment (50% vs 33%) and ratings volume (277 vs 17). KDIAG's advantage is update cadence (every 3 weeks vs every 2 months). On price, ads, in-app purchases and monetization model there is nothing between them.

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

Mucar holds the better App Store score, 4.6 against 3.4. That said, the two scores are not equally well evidenced: Mucar has 277 ratings behind it against 17, so its average is the more settled of the two. Written reviews point the same way: 50% of Mucar's written reviews are positive against 33% of KDIAG's.

Mucar ships an update every 2 months, KDIAG every 3 weeks. The most recent releases landed on September 25, 2026 and September 21, 2026 respectively.

## The numbers

| Metric | Mucar | KDIAG |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.6 (277 ratings)](https://appshunter.io/ios/app/mucar/id1573345684/reviews)** | [3.4 (17 ratings)](https://appshunter.io/ios/app/kdiag/id6450169808/reviews) |
| Number of ratings | **277** | 17 |
| Positive reviews | **49.6% of reviews** | 33.3% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 3 weeks** |
| Monetization | Free | Free |
| Size | 500 MB | 74 MB |
| Requires iOS | **9.0** | 17.0 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 17+ | 4+ |
| Developer | [THINKCAR INC](https://appshunter.io/developer/1464847379) | [祖策 谢](https://appshunter.io/developer/983519195) |

## What reviewers say

### Mucar

[App page](https://appshunter.io/ios/app/mucar/id1573345684)

Access professional-level automotive diagnostic functions, including reading and clearing fault codes, viewing live data, and performing special tests. Supports a wide range of vehicle manufacturers and offers a community forum for users to share insights and get support.

**Highlights:** OE-level professional functions, Full OBD II diagnosis, Maintenance light reset, Support for 39+ manufacturers, Automatic VIN reading, Professional diagnostic reports, In-app user community

**Features:** macOS Compatibility

**In-app purchases:** none

**What reviewers like**

- 👍 Easy to use and read codes
- 👍 Good product for DIY diagnostics
- 👍 Reads all blocks and codes
- 👍 Works well for the price
- 👍 Good diagnostic tool

**What reviewers complain about**

- 👎 Subscription model is expensive
- 👎 Limited functionality on iPhone compared to Android
- 👎 Some features are missing or removed after updates
- 👎 Inconsistent support for car brands
- 👎 Poor translation and localization

**Reported bugs**

- TCM fault cannot be cleared
- App crashes during report generation
- Functions removed after updates (Hyundai, Kia, special functions)
- App crashes or freezes
- Connection errors

**Requested features**

- Add Turkish language support
- Add Perodua and Proton car support
- Improve Russian translation and fix abbreviations
- Add VAZ support for iOS
- Add Haval support for iOS


### KDIAG

[App page](https://appshunter.io/ios/app/kdiag/id6450169808)

This app offers comprehensive automotive fault detection and OBD functions for various car brands. It provides professional diagnostic services to quickly identify and resolve car issues, making driving safer and smoother for enthusiasts and professionals alike. The app supports 8 languages and is free to use.

**Highlights:** Comprehensive automotive fault detection, OBD functions, System fault diagnosis for mainstream brands, Free to use, Supports 8 languages, Professional diagnostic services

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

**In-app purchases:** none


## Frequently asked questions

### Is Mucar free?

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

### Is KDIAG free?

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

### Which has better reviews, Mucar or KDIAG?

Mucar is rated higher. Mucar averages 4.6 out of 5 from 277 ratings, while KDIAG averages 3.4 from 17 ratings.

### Do Mucar or KDIAG have ads?

Neither Mucar nor KDIAG shows ads.

### Which is updated more often, Mucar or KDIAG?

Mucar ships an update every 2 months, and KDIAG every 3 weeks. Most recently, Mucar was updated on September 25, 2026 and KDIAG on September 21, 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.*