# CT for Open Community vs Crystal Identifier Rock guide

The clearest difference is in-app purchases: CT for Open Community at none against Crystal Identifier Rock guide's 2. CT for Open Community also leads on update cadence (every 3 weeks vs every 3 months). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. Crystal Identifier Rock guide sells 2 in-app purchases, starting at $4.99 per 7 days. CT for Open Community asks for nothing beyond the download.

CT for Open Community ships an update every 3 weeks, Crystal Identifier Rock guide every 3 months. The most recent releases landed on November 11, 2026 and November 8, 2026 respectively.

## The numbers

| Metric | CT for Open Community | Crystal Identifier Rock guide |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Every 3 weeks** | Every 3 months |
| Size | 72 MB | 34 MB |
| Requires iOS | 13.0 | 13.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Lookings Soft Pvt.Ltd](https://appshunter.io/developer/1546861502) | [Semen Sharyhin](https://appshunter.io/developer/1463206827) |

## What reviewers say

### CT for Open Community

[App page](https://appshunter.io/ios/app/ct-for-open-community/id1546861500)

**Features:** macOS Compatibility

**In-app purchases:** none


### Crystal Identifier Rock guide

[App page](https://appshunter.io/ios/app/crystal-identifier-rock-guide/id6737513257)

**Features:** macOS Compatibility

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Crystal Identifier Weekly | $4.99 | per 7 days |
| Crystal Identifier Yearly | $24.99 | per year |


## Frequently asked questions

### Is CT for Open Community free?

CT for Open Community is free to download, with no in-app purchases.

### Is Crystal Identifier Rock guide free?

Crystal Identifier Rock guide is free to download, with in-app purchases available.

### Do CT for Open Community or Crystal Identifier Rock guide have ads?

Neither CT for Open Community nor Crystal Identifier Rock guide shows ads.

### Which is updated more often, CT for Open Community or Crystal Identifier Rock guide?

CT for Open Community ships an update every 3 weeks, and Crystal Identifier Rock guide every 3 months. Most recently, CT for Open Community was updated on November 11, 2026 and Crystal Identifier Rock guide on November 8, 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.*