# OpenRock vs CoBook.org

The clearest difference is update cadence: CoBook.org at weekly against OpenRock's every 3 weeks. OpenRock's advantage is iOS requirement (13.0 vs 16.4). 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.

OpenRock ships an update every 3 weeks, CoBook.org weekly. The most recent releases landed on September 24, 2026 and October 2, 2026 respectively.

## The numbers

| Metric | OpenRock | CoBook.org |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.0 (2 ratings)](https://appshunter.io/ios/app/openrock/id6475270460/reviews)** | — |
| Number of ratings | **2** | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 weeks | **Weekly** |
| Monetization | Free | — |
| Size | 17 MB | 83 MB |
| Requires iOS | **13.0** | 16.4 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 9+ | 17+ |
| Developer | [YI Zhao (SHENZHEN) Co.,limited](https://appshunter.io/developer/1723789397) | [CoBook](https://appshunter.io/developer/1516559062) |

## What reviewers say

### OpenRock

[App page](https://appshunter.io/ios/app/openrock/id6475270460)

Customize your earbuds with this app. Adjust sound settings, gestures, and power options. Keep your earbuds updated with the latest firmware.

**Highlights:** Equalizer settings, Gesture customization, Spatial sound control, Sound balance adjustment, Auto power off settings, Voice prompt options, Find my buds feature, Firmware upgrades

**Features:** macOS Compatibility

**In-app purchases:** none


### CoBook.org

[App page](https://appshunter.io/ios/app/cobookorg/id6743755666)

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

**In-app purchases:** none


## Frequently asked questions

### Is OpenRock free?

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

### Is CoBook.org free?

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

### Do OpenRock or CoBook.org have ads?

Neither OpenRock nor CoBook.org shows ads.

### Which is updated more often, OpenRock or CoBook.org?

OpenRock ships an update every 3 weeks, and CoBook.org weekly. Most recently, OpenRock was updated on September 24, 2026 and CoBook.org on October 2, 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.*