# Chess Timing vs Rock Identifier

The clearest difference is in-app purchases: Chess Timing at none against Rock Identifier's 5. Chess Timing also leads on iOS requirement (13.0 vs 17.0). On price, ads and device support there is nothing between them.

Both are free to download. Rock Identifier sells 5 in-app purchases, starting at $4.99 per 7 days. Chess Timing asks for nothing beyond the download.

## The numbers

| Metric | Chess Timing | Rock Identifier |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (2 ratings)](https://appshunter.io/ios/app/rock-identifier-petra/id6756741676/reviews)** |
| Number of ratings | — | **2** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | — | Every 9 days |
| Monetization | — | Free with in-app purchases |
| Size | 16 MB | 37 MB |
| Requires iOS | **13.0** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Ahmed Abu-Kalal](https://appshunter.io/developer/1135500683) | [MUSTAFA RESIT SAHIN](https://appshunter.io/developer/1787713188) |

## What reviewers say

### Chess Timing

[App page](https://appshunter.io/ios/app/chess-timing/id6755680817)

**Features:** macOS Compatibility

**In-app purchases:** none


### Rock Identifier

[App page](https://appshunter.io/ios/app/rock-identifier-petra/id6756741676)

Instantly identify rocks, minerals, and crystals by taking a photo. Get clear details, save your discoveries, and create personalized profiles for your collection. Explore traditional crystal interpretations for learning and enjoyment.

**Highlights:** AI-powered rock identification, Detailed identification results, Personalized stone collection, Customizable rock profiles, Traditional crystal interpretations, Offline saving of scans

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

**In-app purchases (5)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Unlimited Rock Identification | $4.99 | per 7 days |
| Unlimited Rock Identification | $6.99 | per 7 days |
| Unlimited Rock Identification | $7.99 | per month |
| Unlimited Rock Identification | $19.99 | per year |
| Unlimited Rock Identification | $24.99 | per year |


## Frequently asked questions

### Is Chess Timing free?

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

### Is Rock Identifier free?

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

### Do Chess Timing or Rock Identifier have ads?

Neither Chess Timing nor Rock Identifier shows ads.

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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.*