# KDIAG vs Dollarfix

The clearest difference is review sentiment: Dollarfix at 90% against KDIAG's 33%. Dollarfix also leads on rating (4.7 vs 3.4) and ratings volume (55 vs 17). On price, update cadence, ads and in-app purchases there is nothing between them.

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

Dollarfix holds the better App Store score, 4.7 against 3.4. Both are backed by a comparable volume of ratings — 17 and 55 respectively. Written reviews point the same way: 33% of KDIAG's written reviews are positive against 90% of Dollarfix's.

Both ship on a similar rhythm, roughly every 3 weeks. The most recent releases landed on September 21, 2026 and October 1, 2026 respectively.

## The numbers

| Metric | KDIAG | Dollarfix |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [3.4 (17 ratings)](https://appshunter.io/ios/app/kdiag/id6450169808/reviews) | **[4.7 (55 ratings)](https://appshunter.io/ios/app/dollarfix/id6739483382/reviews)** |
| Number of ratings | 17 | **55** |
| Positive reviews | 33.3% of reviews | **90.3% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 weeks | Every 3 weeks |
| Monetization | Free | Free |
| Size | 74 MB | 894 MB |
| Requires iOS | 17.0 | **13.0** |
| Devices | iPhone, iPad | iPhone, iPod |
| Age rating | 4+ | 17+ |
| Developer | [祖策 谢](https://appshunter.io/developer/983519195) | [MATL TECH INC.](https://appshunter.io/developer/1735263917) |

## What reviewers say

### 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


### Dollarfix

[App page](https://appshunter.io/ios/app/dollarfix/id6739483382)

A social platform for car enthusiasts to share content, join communities, and get expert advice. It also offers vehicle diagnostic services, connecting to devices for OBD functions and maintenance checks.

**Highlights:** Automotive content sharing and discussion, Create and join car communities, Real-time car news and updates, Connect with car experts, Software diagnostic function, OBD functions and vehicle maintenance

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

**In-app purchases:** none


## Frequently asked questions

### Is KDIAG free?

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

### Is Dollarfix free?

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

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

Dollarfix is rated higher. KDIAG averages 3.4 out of 5 from 17 ratings, while Dollarfix averages 4.7 from 55 ratings.

### Do KDIAG or Dollarfix have ads?

Neither KDIAG nor Dollarfix shows ads.

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

KDIAG ships an update every 3 weeks, and Dollarfix every 3 weeks. Most recently, KDIAG was updated on September 21, 2026 and Dollarfix on October 1, 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.*