# KDIAG vs AMRTP Compare+

The clearest difference is iOS requirement: AMRTP Compare+ at 15.1 against KDIAG's 17.0. 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.

KDIAG ships an update every 3 weeks, AMRTP Compare+ every 4 weeks. The most recent releases landed on September 21, 2026 and September 27, 2026 respectively.

## The numbers

| Metric | KDIAG | AMRTP Compare+ |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.4 (17 ratings)](https://appshunter.io/ios/app/kdiag/id6450169808/reviews)** | — |
| Number of ratings | **17** | — |
| Positive reviews | 33.3% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 3 weeks** | Every 4 weeks |
| Monetization | Free | — |
| Size | 74 MB | 39 MB |
| Requires iOS | 17.0 | **15.1** |
| Devices | iPhone, iPad | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [祖策 谢](https://appshunter.io/developer/983519195) | [Joel Parfait Dje](https://appshunter.io/developer/1778958973) |

## 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


### AMRTP Compare+

[App page](https://appshunter.io/ios/app/amrtp-compare-plus/id6796992979)

**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 AMRTP Compare+ free?

AMRTP Compare+ is free to download, with no in-app purchases.

### Do KDIAG or AMRTP Compare+ have ads?

Neither KDIAG nor AMRTP Compare+ shows ads.

### Which is updated more often, KDIAG or AMRTP Compare+?

KDIAG ships an update every 3 weeks, and AMRTP Compare+ every 4 weeks. Most recently, KDIAG was updated on September 21, 2026 and AMRTP Compare+ on September 27, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*