# Rock Identifier vs GemTrail

The clearest difference is in-app purchases: GemTrail at none against Rock Identifier's 2. GemTrail also leads on update cadence (every 6 weeks vs every 7 months). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. Rock Identifier sells 2 in-app purchases, starting at $6.99 per 7 days. GemTrail asks for nothing beyond the download.

Rock Identifier ships an update every 7 months, GemTrail every 6 weeks. The most recent releases landed on October 31, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | Rock Identifier | GemTrail |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.8 (8 ratings)](https://appshunter.io/ios/app/rock-identifier-scan-stone/id6757264332/reviews)** | — |
| Number of ratings | **8** | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 7 months | **Every 6 weeks** |
| Monetization | Free with in-app purchases | — |
| Size | 76 MB | 51 MB |
| Requires iOS | **16.4** | 17.0 |
| Devices | **iPhone, iPad** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Wiktor Pabich](https://appshunter.io/developer/1842657816) | [BYTECRAFTERSLIMITED](https://appshunter.io/developer/6786246578) |

## What reviewers say

### Rock Identifier

[App page](https://appshunter.io/ios/app/rock-identifier-scan-stone/id6757264332)

Instantly identify rocks, minerals, and gems by simply taking a photo. This app provides detailed information on composition, properties, and uses, helping you build a personal collection of your discoveries.

**Highlights:** Instant rock identification, Accurate mineral recognition, Detailed information on composition and uses, Crystal and gem insights, Save scans to a personal library

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Rock Identifier Weekly Subscription | $6.99 | per 7 days |
| Rock Identifier Annual Subscription | $34.99 | per year |


### GemTrail

[App page](https://appshunter.io/ios/app/gemtrail-rock-identifier/id6786246576)

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

**In-app purchases:** none


## Frequently asked questions

### Is Rock Identifier free?

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

### Is GemTrail free?

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

### Do Rock Identifier or GemTrail have ads?

Neither Rock Identifier nor GemTrail shows ads.

### Which is updated more often, Rock Identifier or GemTrail?

Rock Identifier ships an update every 7 months, and GemTrail every 6 weeks. Most recently, Rock Identifier was updated on October 31, 2026 and GemTrail on October 25, 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.*