# KDIAG vs Numio

The clearest difference is price: KDIAG at Free against Numio's $0.99. KDIAG also leads on iOS requirement (17.0 vs 26.2). Numio's advantage is update cadence (weekly vs fortnightly). On ads, in-app purchases and device support there is nothing between them.

KDIAG is free to download; Numio costs $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.

KDIAG ships an update fortnightly, Numio weekly. The most recent releases landed on October 24, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | KDIAG | Numio |
| --- | --- | --- |
| Price | **Free** | $0.99 |
| Rating | **[3.3 (20 ratings)](https://appshunter.io/ios/app/kdiag/id6450169808/reviews)** | — |
| Number of ratings | **20** | — |
| Positive reviews | 30.8% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Fortnightly | **Weekly** |
| Monetization | Free | — |
| Size | 74 MB | 5 MB |
| Requires iOS | **17.0** | 26.2 |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [祖策 谢](https://appshunter.io/developer/983519195) | [GameOcean](https://appshunter.io/developer/1647958286) |

## 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


### Numio

[App page](https://appshunter.io/ios/app/numio-calculator-widget/id6757761331)

**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 Numio free?

Numio costs $0.99, with no in-app purchases.

### Do KDIAG or Numio have ads?

Neither KDIAG nor Numio shows ads.

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

KDIAG ships an update fortnightly, and Numio weekly. Most recently, KDIAG was updated on October 24, 2026 and Numio on October 31, 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.*