# Cayin Control vs UmbraQRGen

The clearest difference is rating: UmbraQRGen at 5.0 against Cayin Control's 1.0. Cayin Control's advantage is update cadence (every 2 weeks vs every 5 months) and device support (3 vs 1). On price, ratings volume, 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.

UmbraQRGen holds the better App Store score, 5.0 against 1.0. Both are backed by a comparable volume of ratings — 1 and 1 respectively.

Cayin Control ships an update every 2 weeks, UmbraQRGen every 5 months. The most recent releases landed on October 30, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | Cayin Control | UmbraQRGen |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [1.0 (1 ratings)](https://appshunter.io/ios/app/cayin-control/id6748970522/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/umbraqrgen/id6762829210/reviews)** |
| Number of ratings | 1 | 1 |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 2 weeks** | Every 5 months |
| Monetization | Free | Free |
| Size | 179 MB | 5 MB |
| Requires iOS | **13.0** | 16.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Zhuhai Spark Electronic Equipment Co., Ltd.](https://appshunter.io/developer/1828320462) | [Bryan Murphy](https://appshunter.io/developer/1894867204) |

## What reviewers say

### Cayin Control

[App page](https://appshunter.io/ios/app/cayin-control/id6748970522)

This app allows users to remotely manage and control Cayin Hi-Fi audio hardware over a local network. It offers features like device pairing, custom EQ settings, multi-screen playback, and playlist creation for an optimized audio experience.

**Highlights:** LAN device pairing, Custom parametric EQ, Multi-screen interactive playback, Precise playback control, Custom playlist creation, Centralized device management

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

**In-app purchases:** none


### UmbraQRGen

[App page](https://appshunter.io/ios/app/umbraqrgen/id6762829210)

Generate various QR codes directly on your device without needing an account or internet connection. This app prioritizes user privacy by not collecting any personal information or using servers. It offers a straightforward and secure way to create QR codes.

**Highlights:** Create multiple QR code types, Offline functionality, No account or login required, No server usage, User data privacy focused

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

**In-app purchases:** none


## Frequently asked questions

### Is Cayin Control free?

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

### Is UmbraQRGen free?

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

### Which has better reviews, Cayin Control or UmbraQRGen?

UmbraQRGen is rated higher. Cayin Control averages 1.0 out of 5 from 1 ratings, while UmbraQRGen averages 5.0 from 1 ratings.

### Do Cayin Control or UmbraQRGen have ads?

Neither Cayin Control nor UmbraQRGen shows ads.

### Which is updated more often, Cayin Control or UmbraQRGen?

Cayin Control ships an update every 2 weeks, and UmbraQRGen every 5 months. Most recently, Cayin Control was updated on October 30, 2026 and UmbraQRGen 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.*