# Cayin Control vs Grim Reader

The clearest difference is rating: Grim Reader at 5.0 against Cayin Control's 1.0. Grim Reader also leads on ratings volume (4 vs 1). Cayin Control's advantage is iOS requirement (13.0 vs 17.0). On price, update cadence, 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.

Grim Reader holds the better App Store score, 5.0 against 1.0. Both are backed by a comparable volume of ratings — 1 and 4 respectively.

Both ship on a similar rhythm, roughly every 2 weeks. The most recent releases landed on September 22, 2026 and October 10, 2026 respectively.

## The numbers

| Metric | Cayin Control | Grim Reader |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [1.0 (1 ratings)](https://appshunter.io/ios/app/cayin-control/id6748970522/reviews) | **[5.0 (4 ratings)](https://appshunter.io/ios/app/grim-reader/id6782366876/reviews)** |
| Number of ratings | 1 | **4** |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 weeks | Every 2 weeks |
| Monetization | Free | Free |
| Size | 179 MB | 16 MB |
| Requires iOS | **13.0** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Zhuhai Spark Electronic Equipment Co., Ltd.](https://appshunter.io/developer/1828320462) | [Maarten de Kreij](https://appshunter.io/developer/6774006735) |

## 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


### Grim Reader

[App page](https://appshunter.io/ios/app/grim-reader/id6782366876)

Organize and enrich your personal library of e-books, comics, and audiobooks. This app allows you to manage your collection locally or via your own servers, adding details like covers and author information. Enjoy a seamless reading and listening experience across all your content.

**Highlights:** Library management for e-books, comics, and audiobooks, Enrich library with online book and author data, Supports local files and personal servers (WebDAV, OPDS), Cross-device reading and listening progress tracking, Organize by author, series, and genre, Mark favorites

**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 Grim Reader free?

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

### Which has better reviews, Cayin Control or Grim Reader?

Grim Reader is rated higher. Cayin Control averages 1.0 out of 5 from 1 ratings, while Grim Reader averages 5.0 from 4 ratings.

### Do Cayin Control or Grim Reader have ads?

Neither Cayin Control nor Grim Reader shows ads.

### Which is updated more often, Cayin Control or Grim Reader?

Cayin Control ships an update every 2 weeks, and Grim Reader every 2 weeks. Most recently, Cayin Control was updated on September 22, 2026 and Grim Reader on October 10, 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.*