# AIT LAUNCH vs KDIAG

The clearest difference is rating: KDIAG at 3.3 against AIT LAUNCH's 1.0. KDIAG also leads on review sentiment (31% vs 0%) and update cadence (fortnightly vs every 4 months). AIT LAUNCH's advantage is iOS requirement (8.0 vs 17.0). 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.

KDIAG holds the better App Store score, 3.3 against 1.0. That said, the two scores are not equally well evidenced: KDIAG has 20 ratings behind it against 2, so its average is the more settled of the two. Written reviews point the same way: 0% of AIT LAUNCH's written reviews are positive against 31% of KDIAG's.

AIT LAUNCH ships an update every 4 months, KDIAG fortnightly. The most recent releases landed on October 16, 2026 and October 8, 2026 respectively.

## The numbers

| Metric | AIT LAUNCH | KDIAG |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [1.0 (2 ratings)](https://appshunter.io/ios/app/ait-launch/id1236643578/reviews) | **[3.3 (20 ratings)](https://appshunter.io/ios/app/kdiag/id6450169808/reviews)** |
| Number of ratings | 2 | **20** |
| Positive reviews | 0.0% of reviews | **30.8% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 4 months | **Fortnightly** |
| Monetization | Free | Free |
| Size | 20 MB | 74 MB |
| Requires iOS | **8.0** | 17.0 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Launch Tech Co., Ltd](https://appshunter.io/developer/447568418) | [祖策 谢](https://appshunter.io/developer/983519195) |

## What reviewers say

### AIT LAUNCH

[App page](https://appshunter.io/ios/app/ait-launch/id1236643578)

This app provides a smart solution for automotive inspections, allowing users to perform full vehicle system checks without manual interaction. View detailed inspection reports on your mobile device after plugging the terminal into your car's data link connector.

**Highlights:** Full vehicle system inspection, Professional inspection reports, Remote diagnosis capability, Value-added service for businesses, Push notifications for car owners, Share inspection reports

**Features:** macOS Compatibility

**In-app purchases:** none


### 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 AIT LAUNCH free?

AIT LAUNCH 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, AIT LAUNCH or KDIAG?

KDIAG is rated higher. AIT LAUNCH averages 1.0 out of 5 from 2 ratings, while KDIAG averages 3.3 from 20 ratings.

### Do AIT LAUNCH or KDIAG have ads?

Neither AIT LAUNCH nor KDIAG shows ads.

### Which is updated more often, AIT LAUNCH or KDIAG?

AIT LAUNCH ships an update every 4 months, and KDIAG fortnightly. Most recently, AIT LAUNCH was updated on October 16, 2026 and KDIAG on October 8, 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.*