# KCK QR reader vs ScanRelay

The clearest difference is update cadence: ScanRelay at every 3 weeks against KCK QR reader's every 38 months. On price, ads, in-app purchases and device support there is nothing between them.

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

KCK QR reader ships an update every 38 months, ScanRelay every 3 weeks. The most recent releases landed on September 8, 2026 and May 19, 2026 respectively.

## The numbers

| Metric | KCK QR reader | ScanRelay |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 38 months | **Every 3 weeks** |
| Size | 3 MB | 20 MB |
| Requires iOS | **12.0** | 13.0 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [CRITERIA Co.,Ltd.](https://appshunter.io/developer/1441383670) | [Guncy Inc.](https://appshunter.io/developer/1831154806) |

## What reviewers say

### KCK QR reader

[App page](https://appshunter.io/ios/app/kck-qr-reader/id1515072463)

**Features:** macOS Compatibility

**In-app purchases:** none


### ScanRelay

[App page](https://appshunter.io/ios/app/scanrelay/id6749557540)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is KCK QR reader free?

KCK QR reader is free to download, with no in-app purchases.

### Is ScanRelay free?

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

### Do KCK QR reader or ScanRelay have ads?

Neither KCK QR reader nor ScanRelay shows ads.

### Which is updated more often, KCK QR reader or ScanRelay?

KCK QR reader ships an update every 38 months, and ScanRelay every 3 weeks. Most recently, KCK QR reader was updated on September 8, 2026 and ScanRelay on May 19, 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.*