# Authenticate By KDC vs Scan QR Code Master *

The clearest difference is in-app purchases: Authenticate By KDC at none against Scan QR Code Master *'s 1. Scan QR Code Master *'s advantage is update cadence (weekly vs every 5 weeks). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. Scan QR Code Master * sells 1 in-app purchase, starting at $3.99 per 7 days. Authenticate By KDC asks for nothing beyond the download.

Authenticate By KDC ships an update every 5 weeks, Scan QR Code Master * weekly. The most recent releases landed on September 30, 2026 and September 12, 2026 respectively.

## The numbers

| Metric | Authenticate By KDC | Scan QR Code Master * |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 5 weeks | **Weekly** |
| Size | 4 MB | 11 MB |
| Requires iOS | **17.6** | 18.0 |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Kenneth Lovett](https://appshunter.io/developer/1831085892) | [Hang Ma](https://appshunter.io/developer/1808693825) |

## What reviewers say

### Authenticate By KDC

[App page](https://appshunter.io/ios/app/authenticate-by-kdc/id6751268798)

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

**In-app purchases:** none


### Scan QR Code Master *

[App page](https://appshunter.io/ios/app/scan-qr-code-master/id6756308668)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Scan QR Code Master - Pro Weekly | $3.99 | per 7 days |


## Frequently asked questions

### Is Authenticate By KDC free?

Authenticate By KDC is free to download, with no in-app purchases.

### Is Scan QR Code Master * free?

Scan QR Code Master * is free to download, with in-app purchases available.

### Do Authenticate By KDC or Scan QR Code Master * have ads?

Neither Authenticate By KDC nor Scan QR Code Master * shows ads.

### Which is updated more often, Authenticate By KDC or Scan QR Code Master *?

Authenticate By KDC ships an update every 5 weeks, and Scan QR Code Master * weekly. Most recently, Authenticate By KDC was updated on September 30, 2026 and Scan QR Code Master * on September 12, 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.*