# QR Code Studio Pro vs K信

The clearest difference is price: K信 at Free against QR Code Studio Pro's $2.99. K信 also leads on in-app purchases (none vs 4) and ads (none vs shown). On device support and iOS requirement there is nothing between them.

K信 is free to download; QR Code Studio Pro costs $2.99 up front. QR Code Studio Pro sells 4 one-off in-app purchases. K信 asks for nothing beyond the download.

QR Code Studio Pro ships an update every 3 months, K信 every 10 days. Both last shipped on October 12, 2026.

## The numbers

| Metric | QR Code Studio Pro | K信 |
| --- | --- | --- |
| Price | $2.99 | **Free** |
| Rating | **[4.2 (18 ratings)](https://appshunter.io/ios/app/qr-code-studio-pro-qr-scanner/id921217360/reviews)** | — |
| Number of ratings | **18** | — |
| Positive reviews | 73.1% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | Every 3 months | **Every 10 days** |
| Monetization | Free with in-app purchases | — |
| Size | 54 MB | 143 MB |
| Requires iOS | **12** | 13.0 |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 17+ |
| Developer | [芸倩 潘](https://appshunter.io/developer/837969194) | [杰人软件](https://appshunter.io/developer/1131518325) |

## What reviewers say

### QR Code Studio Pro

[App page](https://appshunter.io/ios/app/qr-code-studio-pro-qr-scanner/id921217360)

Easily create and scan colorful QR codes with advanced features like dynamic content, image embedding, and app-specific redirection. Securely share encrypted codes and manage your history with privacy protection.

**Highlights:** Create colorful QR codes, Dynamic QR code generation, Embed images and logos, Fast dual-scan QR reader, Secure encrypted sharing, Scan and generation history, App-specific redirection

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

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 1 Coin | $0.99 | one-time |
| 10 Coins | $0.99 | one-time |
| 12 Coins | $1.99 | one-time |
| 30 Coins | $4.99 | one-time |


### K信

[App page](https://appshunter.io/ios/app/k/id1251760533)

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

**In-app purchases:** none


## Frequently asked questions

### Is QR Code Studio Pro free?

QR Code Studio Pro costs $2.99, and also offers in-app purchases.

### Is K信 free?

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

### Do QR Code Studio Pro or K信 have ads?

QR Code Studio Pro shows ads; K信 does not.

### Which is updated more often, QR Code Studio Pro or K信?

QR Code Studio Pro ships an update every 3 months, and K信 every 10 days. Most recently, QR Code Studio Pro was updated on October 12, 2026 and K信 on October 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.*